diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 8a1fe45f..37711e2c 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -12,7 +12,7 @@ Here are some key points to include in your description:
 
 ### Checklist
 
-- [ ] I have read the [contributing doc](https://github.com/jrnl-org/jrnl/blob/develop/CONTRIBUTING.md).
+- [ ] I have read the [contributing doc](https://github.com/jrnl-org/jrnl/blob/develop/docs/contributing.md).
 - [ ] I have included a link to the relevant issue number.
 - [ ] I have checked to ensure there aren't other open [pull requests](../pulls)
   for the same issue.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 06ea5d96..f94e58e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,40 @@
 # Changelog
 
-## [Unreleased](https://github.com/jrnl-org/jrnl/)
+## [v4.0-beta3](https://pypi.org/project/jrnl/v4.0-beta3/) (2023-04-29)
 
-[Full Changelog](https://github.com/jrnl-org/jrnl/compare/v3.3...HEAD)
+[Full Changelog](https://github.com/jrnl-org/jrnl/compare/v4.0-beta2...v4.0-beta3)
+
+**Fixed bugs:**
+
+- jrnl reads extraneous text files when reading folder journal [\#1692](https://github.com/jrnl-org/jrnl/issues/1692)
+- jrnl crashes when adding tag argument after `--change-time` [\#1644](https://github.com/jrnl-org/jrnl/issues/1644)
+- Only read text files that look like entries when opening folder journal [\#1697](https://github.com/jrnl-org/jrnl/pull/1697) ([micahellison](https://github.com/micahellison))
+
+**Documentation:**
+
+- Update contributing.md links in documentation [\#1726](https://github.com/jrnl-org/jrnl/pull/1726) ([ahosking](https://github.com/ahosking))
+
+## [v4.0-beta2](https://pypi.org/project/jrnl/v4.0-beta2/) (2023-04-22)
+
+[Full Changelog](https://github.com/jrnl-org/jrnl/compare/v4.0-beta...v4.0-beta2)
+
+**Documentation:**
+
+- Fix various typos [\#1718](https://github.com/jrnl-org/jrnl/pull/1718) ([hezhizhen](https://github.com/hezhizhen))
+
+**Packaging:**
+
+- Update dependency cryptography to v40.0.2 [\#1723](https://github.com/jrnl-org/jrnl/pull/1723) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency flakeheaven to v3.3.0 [\#1722](https://github.com/jrnl-org/jrnl/pull/1722) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency pytest to v7.3.1 [\#1720](https://github.com/jrnl-org/jrnl/pull/1720) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency black to v23.3.0 [\#1715](https://github.com/jrnl-org/jrnl/pull/1715) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency flake8-type-checking to v2.4.0 [\#1714](https://github.com/jrnl-org/jrnl/pull/1714) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency rich to v13.3.4 [\#1713](https://github.com/jrnl-org/jrnl/pull/1713) ([renovate[bot]](https://github.com/apps/renovate))
+- Update dependency tox to v4.4.12 [\#1712](https://github.com/jrnl-org/jrnl/pull/1712) ([renovate[bot]](https://github.com/apps/renovate))
+
+## [v4.0-beta](https://pypi.org/project/jrnl/v4.0-beta/) (2023-03-25)
+
+[Full Changelog](https://github.com/jrnl-org/jrnl/compare/v3.3...v4.0-beta)
 
 **Implemented enhancements:**
 
diff --git a/README.md b/README.md
index 87c1a859..a99f0ba8 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ jrnl
 ====
 
 _To get help, [submit an issue](https://github.com/jrnl-org/jrnl/issues/new/choose) on
-Github._
+GitHub._
 
 `jrnl` is a simple journal application for the command line.
 
@@ -70,7 +70,7 @@ src="https://opencollective.com/jrnl/contributors.svg?width=890&button=false"
 /></a>
 
 If you'd also like to help make `jrnl` better, please see our [contributing
-documentation](CONTRIBUTING.md).
+documentation](docs/contributing.md).
 
 ### Financial Backers
 
diff --git a/jrnl/__version__.py b/jrnl/__version__.py
index 3d0bbe9b..6689f558 100644
--- a/jrnl/__version__.py
+++ b/jrnl/__version__.py
@@ -1 +1 @@
-__version__ = "v3.3"
+__version__ = "v4.0-beta3"
diff --git a/jrnl/args.py b/jrnl/args.py
index 5c0283c9..9b7dafe7 100644
--- a/jrnl/args.py
+++ b/jrnl/args.py
@@ -331,7 +331,7 @@ def parse_args(args: list[str] = []) -> argparse.Namespace:
         nargs="?",
         metavar="DATE",
         const="now",
-        help="Change timestamp for seleted entries (default: now)",
+        help="Change timestamp for selected entries (default: now)",
     )
     exporting.add_argument(
         "--format",
@@ -360,7 +360,7 @@ def parse_args(args: list[str] = []) -> argparse.Namespace:
         "--tags",
         dest="tags",
         action="store_true",
-        help="Alias for '--format tags'. Returns a list of all tags and number of occurences",
+        help="Alias for '--format tags'. Returns a list of all tags and number of occurrences",
     )
     exporting.add_argument(
         "--short",
diff --git a/jrnl/journals/FolderJournal.py b/jrnl/journals/FolderJournal.py
index 88fa21e1..0d497fb8 100644
--- a/jrnl/journals/FolderJournal.py
+++ b/jrnl/journals/FolderJournal.py
@@ -2,8 +2,8 @@
 # License: https://www.gnu.org/licenses/gpl-3.0.html
 
 import codecs
-import fnmatch
 import os
+import pathlib
 from typing import TYPE_CHECKING
 
 from jrnl import time
@@ -13,14 +13,11 @@ from .Journal import Journal
 if TYPE_CHECKING:
     from jrnl.journals import Entry
 
-
-def get_files(journal_config: str) -> list[str]:
-    """Searches through sub directories starting with journal_config and find all text files"""
-    filenames = []
-    for root, dirnames, f in os.walk(journal_config):
-        for filename in fnmatch.filter(f, "*.txt"):
-            filenames.append(os.path.join(root, filename))
-    return filenames
+# glob search patterns for folder/file structure
+DIGIT_PATTERN = "[0123456789]"
+YEAR_PATTERN = DIGIT_PATTERN * 4
+MONTH_PATTERN = "[01]" + DIGIT_PATTERN
+DAY_PATTERN = "[0123]" + DIGIT_PATTERN + ".txt"
 
 
 class Folder(Journal):
@@ -35,12 +32,15 @@ class Folder(Journal):
     def open(self) -> "Folder":
         filenames = []
         self.entries = []
-        filenames = get_files(self.config["journal"])
-        for filename in filenames:
-            with codecs.open(filename, "r", "utf-8") as f:
-                journal = f.read()
-                self.entries.extend(self._parse(journal))
-        self.sort()
+
+        if os.path.exists(self.config["journal"]):
+            filenames = Folder._get_files(self.config["journal"])
+            for filename in filenames:
+                with codecs.open(filename, "r", "utf-8") as f:
+                    journal = f.read()
+                    self.entries.extend(self._parse(journal))
+            self.sort()
+
         return self
 
     def write(self) -> None:
@@ -81,7 +81,7 @@ class Folder(Journal):
                 journal_file.write(journal)
         # look for and delete empty files
         filenames = []
-        filenames = get_files(self.config["journal"])
+        filenames = Folder._get_files(self.config["journal"])
         for filename in filenames:
             if os.stat(filename).st_size <= 0:
                 os.remove(filename)
@@ -119,3 +119,39 @@ class Folder(Journal):
 
         self.increment_change_counts_by_edit(mod_entries)
         self.entries = mod_entries
+
+    @staticmethod
+    def _get_files(journal_path: str) -> list[str]:
+        """Searches through sub directories starting with journal_path and find all text files that look like entries"""
+        for year_folder in Folder._get_year_folders(pathlib.Path(journal_path)):
+            for month_folder in Folder._get_month_folders(year_folder):
+                yield from Folder._get_day_files(month_folder)
+
+    @staticmethod
+    def _get_year_folders(path: pathlib.Path) -> list[pathlib.Path]:
+        for child in path.glob(YEAR_PATTERN):
+            if child.is_dir():
+                yield child
+        return
+
+    @staticmethod
+    def _get_month_folders(path: pathlib.Path) -> list[pathlib.Path]:
+        for child in path.glob(MONTH_PATTERN):
+            if int(child.name) > 0 and int(child.name) <= 12 and path.is_dir():
+                yield child
+        return
+
+    @staticmethod
+    def _get_day_files(path: pathlib.Path) -> list[str]:
+        for child in path.glob(DAY_PATTERN):
+            if (
+                int(child.stem) > 0
+                and int(child.stem) <= 31
+                and time.is_valid_date(
+                    year=int(path.parent.name),
+                    month=int(path.name),
+                    day=int(child.stem),
+                )
+                and child.is_file()
+            ):
+                yield str(child)
diff --git a/jrnl/time.py b/jrnl/time.py
index f91d490c..dd6fcb0f 100644
--- a/jrnl/time.py
+++ b/jrnl/time.py
@@ -34,7 +34,7 @@ def parse(
     elif isinstance(date_str, datetime.datetime):
         return date_str
 
-    # Don't try to parse anything with 6 or less characters and was parsed from the existing journal.
+    # Don't try to parse anything with 6 or fewer characters and was parsed from the existing journal.
     # It's probably a markdown footnote
     if len(date_str) <= 6 and bracketed:
         return None
@@ -83,9 +83,17 @@ def parse(
         date = datetime.datetime(*date[:6])
 
     # Ugly heuristic: if the date is more than 4 weeks in the future, we got the year wrong.
-    # Rather then this, we would like to see parsedatetime patched so we can tell it to prefer
+    # Rather than this, we would like to see parsedatetime patched so we can tell it to prefer
     # past dates
     dt = datetime.datetime.now() - date
     if dt.days < -28 and not year_present:
         date = date.replace(date.year - 1)
     return date
+
+
+def is_valid_date(year: int, month: int, day: int) -> bool:
+    try:
+        datetime.datetime(year, month, day)
+        return True
+    except ValueError:
+        return False
diff --git a/poetry.lock b/poetry.lock
index 26f04a0e..9321fab6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.4.2 and should not be changed by hand.
 
 [[package]]
 name = "ansiwrap"
@@ -57,25 +57,6 @@ six = "*"
 [package.extras]
 test = ["astroid", "pytest"]
 
-[[package]]
-name = "attrs"
-version = "22.2.0"
-description = "Classes Without Boilerplate"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-files = [
-    {file = "attrs-22.2.0-py3-none-any.whl", hash = "sha256:29e95c7f6778868dbd49170f98f8818f78f3dc5e0e37c0b1f474e3561b240836"},
-    {file = "attrs-22.2.0.tar.gz", hash = "sha256:c9227bfc2f01993c03f68db37d1d15c9690188323c067c641f1a35ca58185f99"},
-]
-
-[package.extras]
-cov = ["attrs[tests]", "coverage-enable-subprocess", "coverage[toml] (>=5.3)"]
-dev = ["attrs[docs,tests]"]
-docs = ["furo", "myst-parser", "sphinx", "sphinx-notfound-page", "sphinxcontrib-towncrier", "towncrier", "zope.interface"]
-tests = ["attrs[tests-no-zope]", "zope.interface"]
-tests-no-zope = ["cloudpickle", "cloudpickle", "hypothesis", "hypothesis", "mypy (>=0.971,<0.990)", "mypy (>=0.971,<0.990)", "pympler", "pympler", "pytest (>=4.3.0)", "pytest (>=4.3.0)", "pytest-mypy-plugins", "pytest-mypy-plugins", "pytest-xdist[psutil]", "pytest-xdist[psutil]"]
-
 [[package]]
 name = "backcall"
 version = "0.2.0"
@@ -90,37 +71,37 @@ files = [
 
 [[package]]
 name = "black"
-version = "23.1.0"
+version = "23.3.0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
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 ]
 
 [package.dependencies]
@@ -389,31 +370,31 @@ files = [
 
 [[package]]
 name = "cryptography"
-version = "40.0.1"
+version = "40.0.2"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 category = "main"
 optional = false
 python-versions = ">=3.6"
 files = [
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+    {file = "cryptography-40.0.2-pp39-pypy39_pp73-manylinux_2_28_aarch64.whl", hash = "sha256:c0764e72b36a3dc065c155e5b22f93df465da9c39af65516fe04ed3c68c92636"},
+    {file = "cryptography-40.0.2-pp39-pypy39_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:cbaba590180cba88cb99a5f76f90808a624f18b169b90a4abb40c1fd8c19420e"},
+    {file = "cryptography-40.0.2-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:7a38250f433cd41df7fcb763caa3ee9362777fdb4dc642b9a349721d2bf47404"},
+    {file = "cryptography-40.0.2.tar.gz", hash = "sha256:c33c0d32b8594fa647d2e01dbccc303478e16fdd7cf98652d5b3ed11aa5e5c99"},
 ]
 
 [package.dependencies]
@@ -512,19 +493,19 @@ tests = ["asttokens", "littleutils", "pytest", "rich"]
 
 [[package]]
 name = "filelock"
-version = "3.9.0"
+version = "3.11.0"
 description = "A platform independent file lock."
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "filelock-3.9.0-py3-none-any.whl", hash = "sha256:f58d535af89bb9ad5cd4df046f741f8553a418c01a7856bf0d173bbc9f6bd16d"},
-    {file = "filelock-3.9.0.tar.gz", hash = "sha256:7b319f24340b51f55a2bf7a12ac0755a9b03e718311dac567a0f4f7fabd2f5de"},
+    {file = "filelock-3.11.0-py3-none-any.whl", hash = "sha256:f08a52314748335c6460fc8fe40cd5638b85001225db78c2aa01c8c0db83b318"},
+    {file = "filelock-3.11.0.tar.gz", hash = "sha256:3618c0da67adcc0506b015fd11ef7faf1b493f0b40d87728e19986b536890c37"},
 ]
 
 [package.extras]
-docs = ["furo (>=2022.12.7)", "sphinx (>=5.3)", "sphinx-autodoc-typehints (>=1.19.5)"]
-testing = ["covdefaults (>=2.2.2)", "coverage (>=7.0.1)", "pytest (>=7.2)", "pytest-cov (>=4)", "pytest-timeout (>=2.1)"]
+docs = ["furo (>=2023.3.27)", "sphinx (>=6.1.3)", "sphinx-autodoc-typehints (>=1.22,!=1.23.4)"]
+testing = ["covdefaults (>=2.3)", "coverage (>=7.2.2)", "diff-cover (>=7.5)", "pytest (>=7.2.2)", "pytest-cov (>=4)", "pytest-mock (>=3.10)", "pytest-timeout (>=2.1)"]
 
 [[package]]
 name = "flake8"
@@ -600,14 +581,14 @@ flake8 = ">=3.7"
 
 [[package]]
 name = "flake8-type-checking"
-version = "2.3.1"
+version = "2.4.0"
 description = "A flake8 plugin for managing type-checking imports & forward references"
 category = "dev"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "flake8_type_checking-2.3.1-py3-none-any.whl", hash = "sha256:4088d9c3b5c8c431d78bb3a6914ddf3cae9a04856b120290f1531f0a0e140c50"},
-    {file = "flake8_type_checking-2.3.1.tar.gz", hash = "sha256:b4c6e5f4fb8309b6fc1c9cec1c6446583d2de94a4a3f25769759d637df0f6574"},
+    {file = "flake8_type_checking-2.4.0-py3-none-any.whl", hash = "sha256:2dee127f300bb95b7f17b7c3fff4f6336f5e4ba92082c15928c6e19b666cfba4"},
+    {file = "flake8_type_checking-2.4.0.tar.gz", hash = "sha256:9ea96d01e6557a47835acf04020c48fabb9c3d4664c15f2920915e09e65c1d55"},
 ]
 
 [package.dependencies]
@@ -616,14 +597,14 @@ flake8 = "*"
 
 [[package]]
 name = "flakeheaven"
-version = "3.2.1"
+version = "3.3.0"
 description = "FlakeHeaven is a [Flake8](https://gitlab.com/pycqa/flake8) wrapper to make it cool."
 category = "dev"
 optional = false
 python-versions = ">=3.7,<4.0"
 files = [
-    {file = "flakeheaven-3.2.1-py3-none-any.whl", hash = "sha256:fdae542414a8cd327dbbc969bb18d5972379570f6562af21b4a83f67bdd6b87c"},
-    {file = "flakeheaven-3.2.1.tar.gz", hash = "sha256:f2d54aedd98b817e94c8c0fcc0da1230b43dbf911ce38aa412d00eb5db6fb71d"},
+    {file = "flakeheaven-3.3.0-py3-none-any.whl", hash = "sha256:ae246197a178845b30b63fc03023f7ba925cc84cc96314ec19807dafcd6b39a3"},
+    {file = "flakeheaven-3.3.0.tar.gz", hash = "sha256:eb07860e028ff8dd56cce742c4766624a37a4ce397fd34300254ab623d13047b"},
 ]
 
 [package.dependencies]
@@ -1217,19 +1198,19 @@ files = [
 
 [[package]]
 name = "platformdirs"
-version = "3.0.0"
+version = "3.2.0"
 description = "A small Python package for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "platformdirs-3.0.0-py3-none-any.whl", hash = "sha256:b1d5eb14f221506f50d6604a561f4c5786d9e80355219694a1b244bcd96f4567"},
-    {file = "platformdirs-3.0.0.tar.gz", hash = "sha256:8a1228abb1ef82d788f74139988b137e78692984ec7b08eaa6c65f1723af28f9"},
+    {file = "platformdirs-3.2.0-py3-none-any.whl", hash = "sha256:ebe11c0d7a805086e99506aa331612429a72ca7cd52a1f0d277dc4adc20cb10e"},
+    {file = "platformdirs-3.2.0.tar.gz", hash = "sha256:d5b638ca397f25f979350ff789db335903d7ea010ab28903f57b27e1b16c2b08"},
 ]
 
 [package.extras]
 docs = ["furo (>=2022.12.7)", "proselint (>=0.13)", "sphinx (>=6.1.3)", "sphinx-autodoc-typehints (>=1.22,!=1.23.4)"]
-test = ["appdirs (==1.4.4)", "covdefaults (>=2.2.2)", "pytest (>=7.2.1)", "pytest-cov (>=4)", "pytest-mock (>=3.10)"]
+test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=7.2.2)", "pytest-cov (>=4)", "pytest-mock (>=3.10)"]
 
 [[package]]
 name = "pluggy"
@@ -1373,38 +1354,37 @@ plugins = ["importlib-metadata"]
 
 [[package]]
 name = "pyproject-api"
-version = "1.5.0"
+version = "1.5.1"
 description = "API to interact with the python pyproject.toml based projects"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pyproject_api-1.5.0-py3-none-any.whl", hash = "sha256:4c111277dfb96bcd562c6245428f27250b794bfe3e210b8714c4f893952f2c17"},
-    {file = "pyproject_api-1.5.0.tar.gz", hash = "sha256:0962df21f3e633b8ddb9567c011e6c1b3dcdfc31b7860c0ede7e24c5a1200fbe"},
+    {file = "pyproject_api-1.5.1-py3-none-any.whl", hash = "sha256:4698a3777c2e0f6b624f8a4599131e2a25376d90fe8d146d7ac74c67c6f97c43"},
+    {file = "pyproject_api-1.5.1.tar.gz", hash = "sha256:435f46547a9ff22cf4208ee274fca3e2869aeb062a4834adfc99a4dd64af3cf9"},
 ]
 
 [package.dependencies]
-packaging = ">=21.3"
+packaging = ">=23"
 tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
 
 [package.extras]
-docs = ["furo (>=2022.9.29)", "sphinx (>=5.3)", "sphinx-autodoc-typehints (>=1.19.5)"]
-testing = ["covdefaults (>=2.2.2)", "importlib-metadata (>=5.1)", "pytest (>=7.2)", "pytest-cov (>=4)", "pytest-mock (>=3.10)", "virtualenv (>=20.17)", "wheel (>=0.38.4)"]
+docs = ["furo (>=2022.12.7)", "sphinx (>=6.1.3)", "sphinx-autodoc-typehints (>=1.22,!=1.23.4)"]
+testing = ["covdefaults (>=2.2.2)", "importlib-metadata (>=6)", "pytest (>=7.2.1)", "pytest-cov (>=4)", "pytest-mock (>=3.10)", "virtualenv (>=20.17.1)", "wheel (>=0.38.4)"]
 
 [[package]]
 name = "pytest"
-version = "7.2.2"
+version = "7.3.1"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pytest-7.2.2-py3-none-any.whl", hash = "sha256:130328f552dcfac0b1cec75c12e3f005619dc5f874f0a06e8ff7263f0ee6225e"},
-    {file = "pytest-7.2.2.tar.gz", hash = "sha256:c99ab0c73aceb050f68929bc93af19ab6db0558791c6a0715723abe9d0ade9d4"},
+    {file = "pytest-7.3.1-py3-none-any.whl", hash = "sha256:3799fa815351fea3a5e96ac7e503a96fa51cc9942c3753cda7651b93c1cfa362"},
+    {file = "pytest-7.3.1.tar.gz", hash = "sha256:434afafd78b1d78ed0addf160ad2b77a30d35d4bdf8af234fe621919d9ed15e3"},
 ]
 
 [package.dependencies]
-attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
 iniconfig = "*"
@@ -1413,7 +1393,7 @@ pluggy = ">=0.12,<2.0"
 tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
 
 [package.extras]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
+testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "xmlschema"]
 
 [[package]]
 name = "pytest-bdd"
@@ -1614,14 +1594,14 @@ use-chardet-on-py3 = ["chardet (>=3.0.2,<6)"]
 
 [[package]]
 name = "rich"
-version = "13.3.2"
+version = "13.3.4"
 description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal"
 category = "main"
 optional = false
 python-versions = ">=3.7.0"
 files = [
-    {file = "rich-13.3.2-py3-none-any.whl", hash = "sha256:a104f37270bf677148d8acb07d33be1569eeee87e2d1beb286a4e9113caf6f2f"},
-    {file = "rich-13.3.2.tar.gz", hash = "sha256:91954fe80cfb7985727a467ca98a7618e5dd15178cc2da10f553b36a93859001"},
+    {file = "rich-13.3.4-py3-none-any.whl", hash = "sha256:22b74cae0278fd5086ff44144d3813be1cedc9115bdfabbfefd86400cb88b20a"},
+    {file = "rich-13.3.4.tar.gz", hash = "sha256:b5d573e13605423ec80bdd0cd5f8541f7844a0e71a13f74cf454ccb2f490708b"},
 ]
 
 [package.dependencies]
@@ -1782,31 +1762,31 @@ files = [
 
 [[package]]
 name = "tox"
-version = "4.4.7"
+version = "4.4.12"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "tox-4.4.7-py3-none-any.whl", hash = "sha256:da10ca1d809b99fae80b706b9dc9656b1daf505a395ac427d130a8a85502d08f"},
-    {file = "tox-4.4.7.tar.gz", hash = "sha256:52c92a96e2c3fd47c5301e9c26f5a871466133d5376958c1ed95ef4ff4629cbe"},
+    {file = "tox-4.4.12-py3-none-any.whl", hash = "sha256:d4be558809d86fad13f4553976b0500352630a8fbfa39ea4b1ce3bd945ba680b"},
+    {file = "tox-4.4.12.tar.gz", hash = "sha256:740f5209d0dec19451b951ee5b1cce4a207acdc7357af84dbc8ec35bcf2c454e"},
 ]
 
 [package.dependencies]
 cachetools = ">=5.3"
 chardet = ">=5.1"
 colorama = ">=0.4.6"
-filelock = ">=3.9"
+filelock = ">=3.11"
 packaging = ">=23"
-platformdirs = ">=2.6.2"
+platformdirs = ">=3.2"
 pluggy = ">=1"
-pyproject-api = ">=1.5"
+pyproject-api = ">=1.5.1"
 tomli = {version = ">=2.0.1", markers = "python_version < \"3.11\""}
-virtualenv = ">=20.17.1"
+virtualenv = ">=20.21"
 
 [package.extras]
-docs = ["furo (>=2022.12.7)", "sphinx (>=6.1.3)", "sphinx-argparse-cli (>=1.11)", "sphinx-autodoc-typehints (>=1.22,!=1.23.4)", "sphinx-copybutton (>=0.5.1)", "sphinx-inline-tabs (>=2022.1.2b11)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=22.12)"]
-testing = ["build[virtualenv] (>=0.10)", "covdefaults (>=2.2.2)", "devpi-process (>=0.3)", "diff-cover (>=7.4)", "distlib (>=0.3.6)", "flaky (>=3.7)", "hatch-vcs (>=0.3)", "hatchling (>=1.12.2)", "psutil (>=5.9.4)", "pytest (>=7.2.1)", "pytest-cov (>=4)", "pytest-mock (>=3.10)", "pytest-xdist (>=3.1)", "re-assert (>=1.1)", "time-machine (>=2.9)", "wheel (>=0.38.4)"]
+docs = ["furo (>=2023.3.27)", "sphinx (>=6.1.3)", "sphinx-argparse-cli (>=1.11)", "sphinx-autodoc-typehints (>=1.22,!=1.23.4)", "sphinx-copybutton (>=0.5.1)", "sphinx-inline-tabs (>=2022.1.2b11)", "sphinxcontrib-towncrier (>=0.2.1a0)", "towncrier (>=22.12)"]
+testing = ["build[virtualenv] (>=0.10)", "covdefaults (>=2.3)", "devpi-process (>=0.3)", "diff-cover (>=7.5)", "distlib (>=0.3.6)", "flaky (>=3.7)", "hatch-vcs (>=0.3)", "hatchling (>=1.14)", "psutil (>=5.9.4)", "pytest (>=7.2.2)", "pytest-cov (>=4)", "pytest-mock (>=3.10)", "pytest-xdist (>=3.2.1)", "re-assert (>=1.1)", "time-machine (>=2.9)", "wheel (>=0.40)"]
 
 [[package]]
 name = "traitlets"
@@ -1886,14 +1866,14 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
 name = "virtualenv"
-version = "20.19.0"
+version = "20.21.0"
 description = "Virtual Python Environment builder"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "virtualenv-20.19.0-py3-none-any.whl", hash = "sha256:54eb59e7352b573aa04d53f80fc9736ed0ad5143af445a1e539aada6eb947dd1"},
-    {file = "virtualenv-20.19.0.tar.gz", hash = "sha256:37a640ba82ed40b226599c522d411e4be5edb339a0c0de030c0dc7b646d61590"},
+    {file = "virtualenv-20.21.0-py3-none-any.whl", hash = "sha256:31712f8f2a17bd06234fa97fdf19609e789dd4e3e4bf108c3da71d710651adbc"},
+    {file = "virtualenv-20.21.0.tar.gz", hash = "sha256:f50e3e60f990a0757c9b68333c9fdaa72d7188caa417f96af9e52407831a3b68"},
 ]
 
 [package.dependencies]
diff --git a/pyproject.toml b/pyproject.toml
index 2c4d0f23..5465a181 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "jrnl"
-version = "v3.3"
+version = "v4.0-beta3"
 description = "Collect your thoughts and notes without leaving the command line."
 authors = [
     "jrnl contributors <maintainers@jrnl.sh>",
diff --git a/tests/data/journals/basic_folder/2020/09/should-be-ignored.txt b/tests/data/journals/basic_folder/2020/09/should-be-ignored.txt
new file mode 100644
index 00000000..4807e608
--- /dev/null
+++ b/tests/data/journals/basic_folder/2020/09/should-be-ignored.txt
@@ -0,0 +1,4 @@
+[2022-03-02 9:25:00 AM] This file should be ignored (month)
+This text file is in a folder journal's month directory ("2020/09"), but it's not in the file name format used by jrnl for folder journal entries, so it should be ignored.
+
+This file should not ever appear in a test.
\ No newline at end of file
diff --git a/tests/data/journals/basic_folder/2020/should-be-ignored.txt b/tests/data/journals/basic_folder/2020/should-be-ignored.txt
new file mode 100644
index 00000000..24f57815
--- /dev/null
+++ b/tests/data/journals/basic_folder/2020/should-be-ignored.txt
@@ -0,0 +1,4 @@
+[2022-03-02 9:25:00 AM] This file should be ignored (year)
+This text file is in a folder journal's year directory ("2020"), but it's not in the file name format used by jrnl for folder journal entries, so it should be ignored.
+
+This file should not ever appear in a test.
\ No newline at end of file
diff --git a/tests/data/journals/basic_folder/should-be-ignored.txt b/tests/data/journals/basic_folder/should-be-ignored.txt
new file mode 100644
index 00000000..35b7ae2f
--- /dev/null
+++ b/tests/data/journals/basic_folder/should-be-ignored.txt
@@ -0,0 +1,4 @@
+[2022-03-02 9:25:00 AM] This file should be ignored (root)
+This text file is in a folder journal's root directory, but it's not in the file name format used by jrnl for folder journal entries, so it should be ignored.
+
+This file should not ever appear in a test.
\ No newline at end of file
diff --git a/tests/unit/test_journals_folder_journal.py b/tests/unit/test_journals_folder_journal.py
new file mode 100644
index 00000000..09a3535f
--- /dev/null
+++ b/tests/unit/test_journals_folder_journal.py
@@ -0,0 +1,59 @@
+# Copyright © 2012-2023 jrnl contributors
+# License: https://www.gnu.org/licenses/gpl-3.0.html
+
+import pathlib
+from unittest import mock
+
+import pytest
+
+from jrnl.journals.FolderJournal import Folder
+
+
+@pytest.mark.parametrize(
+    "inputs_and_outputs",
+    [
+        [
+            "/2020/01",
+            ["02.txt", "03.txt", "31.txt"],
+            ["/2020/01/02.txt", "/2020/01/03.txt", "/2020/01/31.txt"],
+        ],
+        [
+            "/2020/02",  # leap year
+            ["02.txt", "03.txt", "28.txt", "29.txt", "31.txt", "39.txt"],
+            [
+                "/2020/02/02.txt",
+                "/2020/02/03.txt",
+                "/2020/02/28.txt",
+                "/2020/02/29.txt",
+            ],
+        ],
+        [
+            "/2100/02",  # not a leap year
+            ["01.txt", "28.txt", "29.txt", "39.txt"],
+            ["/2100/02/01.txt", "/2100/02/28.txt"],
+        ],
+        [
+            "/2023/04",
+            ["29.txt", "30.txt", "31.txt", "39.txt"],
+            ["/2023/04/29.txt", "/2023/04/30.txt"],
+        ],
+    ],
+)
+def test_get_day_files_expected_filtering(inputs_and_outputs):
+    year_month_path, glob_filenames, expected_output = inputs_and_outputs
+
+    year_month_path = pathlib.Path(year_month_path)
+
+    glob_files = map(lambda x: year_month_path / x, glob_filenames)
+    expected_output = list(map(lambda x: str(pathlib.PurePath(x)), expected_output))
+
+    with (
+        mock.patch("pathlib.Path.glob", return_value=glob_files),
+        mock.patch.object(pathlib.Path, "is_file", return_value=True),
+    ):
+        actual_output = list(Folder._get_day_files(year_month_path))
+        actual_output.sort()
+
+        expected_output.sort()
+
+        assert actual_output == expected_output
diff --git a/tests/unit/test_time.py b/tests/unit/test_time.py
index 8bc5ac8e..1901a4dc 100644
--- a/tests/unit/test_time.py
+++ b/tests/unit/test_time.py
@@ -3,6 +3,8 @@
 
 import datetime
 
+import pytest
+
 from jrnl import time
 
 
@@ -20,3 +22,23 @@ def test_default_minute_is_added():
         default_minute=30,
         bracketed=False,
     ) == datetime.datetime(2020, 6, 20, 0, 30)
+
+
+@pytest.mark.parametrize(
+    "inputs",
+    [
+        [2000, 2, 29, True],
+        [2023, 1, 0, False],
+        [2023, 1, 1, True],
+        [2023, 4, 31, False],
+        [2023, 12, 31, True],
+        [2023, 12, 32, False],
+        [2023, 13, 1, False],
+        [2100, 2, 27, True],
+        [2100, 2, 28, True],
+        [2100, 2, 29, False],
+    ],
+)
+def test_is_valid_date(inputs):
+    year, month, day, expected_result = inputs
+    assert time.is_valid_date(year, month, day) == expected_result