diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..7e2e9bc7
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,226 @@
+version: 2.1
+
+executors:
+  python37:
+    docker:
+      - image: circleci/python:3.7.9
+    resource_class: small
+
+  python38:
+    docker:
+      - image: circleci/python:3.8.6
+    resource_class: small
+
+  python39:
+    docker:
+      - image: cimg/python:3.9.0
+    resource_class: small
+
+  with_browser:
+    docker:
+      - image: cimg/python:3.9.0-browsers
+    resource_class: small
+
+  mac:
+    macos:
+      xcode: 12.1.0
+
+commands:
+
+  get_poetry_deps:
+    steps:
+      - run:
+          name: Checking Python version
+          command: |
+            python --version
+            python --version > /tmp/pythonversion
+      - restore_cache:
+          key: deps-00-{{ checksum "poetry.lock" }}-{{ checksum "/tmp/pythonversion" }}-{{ arch }}
+      - run:
+          name: Installing dependencies
+          command: |
+            poetry config --local virtualenvs.in-project true
+            poetry install --no-root --remove-untracked
+      - save_cache:
+          key: deps-00-{{ checksum "poetry.lock" }}-{{ checksum "/tmp/pythonversion" }}-{{ arch }}
+          paths:
+            - ~/project/.venv
+
+  install_pa11y:
+    steps:
+      - restore_cache:
+          key: deps-00-pa11y
+      - run:
+          name: Install accessibility software (pa11y)
+          command: npm install pa11y pa11y-reporter-junit
+      - save_cache:
+          key: deps-00-pa11y
+          paths:
+            - ~/project/node_modules
+
+  install_pyenv_poetry:
+    steps:
+      - run:
+          name: Checking Python version
+          command: |
+            echo "python: $JRNL_PYTHON_VERSION"
+            echo "$JRNL_PYTHON_VERSION" > /tmp/pythonversion
+      - restore_cache:
+          key: pyenv-00-{{ checksum "/tmp/pythonversion" }}
+      - run:
+          name: Updating path
+          command: echo 'export PATH="$HOME/.pyenv/bin:$HOME/.pyenv/shims:$PATH"' >> $BASH_ENV
+      - run:
+          name: Installing Pyenv
+          command: |
+            if [[ ! -d ~/.pyenv ]]; then
+              curl https://pyenv.run | bash
+            fi
+      - run:
+          name: Installing Python
+          command: |
+            pyenv install -s $JRNL_PYTHON_VERSION
+            pyenv global $JRNL_PYTHON_VERSION
+      - run:
+          name: Installing Poetry
+          command: pip install poetry
+      - save_cache:
+          key: pyenv-00-{{ checksum "/tmp/pythonversion" }}
+          paths:
+            - ~/.pyenv
+
+  pytest:
+    steps:
+      - run:
+          name: Tests - Pytest
+          when: always
+          command: >
+            poetry run pytest
+            --junitxml=reports/pytest/results.xml
+
+  behave:
+    steps:
+      - run:
+          name: Tests - Behave
+          when: always
+          command: >
+            poetry run behave
+            --no-skipped
+            --format progress2
+            --junit
+            --junit-directory reports/behave
+
+  lint:
+    steps:
+      - run:
+          name: Poetry Check
+          when: always
+          command: |
+            poetry --version
+            poetry check
+      - run:
+          name: Black Code Formatter
+          when: always
+          command: |
+            poetry run black --version
+            poetry run black --check --diff .
+      - run:
+          name: PyFlakes
+          when: always
+          command: |
+            poetry run pyflakes --version
+            poetry run pyflakes jrnl features tests
+
+aliases:
+  linux_test: &linux_test
+    steps:
+      - checkout
+      - get_poetry_deps
+      - run: poetry install
+      - pytest
+      - behave
+      - store_test_results:
+          path: reports
+  mac_test: &mac_test
+    steps:
+      - checkout
+      - install_pyenv_poetry
+      - get_poetry_deps
+      - run: poetry install
+      - pytest
+      - behave
+      - store_test_results:
+          path: reports
+
+jobs:
+  test_37_linux:
+    executor: python37
+    <<: *linux_test
+
+  test_38_linux:
+    executor: python38
+    <<: *linux_test
+
+  test_39_linux:
+    executor: python39
+    <<: *linux_test
+
+  test_37_mac:
+    executor: mac
+    environment:
+      JRNL_PYTHON_VERSION: 3.7.8
+    <<: *mac_test
+
+  test_38_mac:
+    executor: mac
+    environment:
+      JRNL_PYTHON_VERSION: 3.8.6
+    <<: *mac_test
+
+  test_39_mac:
+    executor: mac
+    environment:
+      JRNL_PYTHON_VERSION: 3.9.0
+    <<: *mac_test
+
+  linting:
+    executor: python39
+    steps:
+      - checkout
+      - get_poetry_deps
+      - lint
+
+  docs_a11y:
+    executor: with_browser
+    steps:
+      - checkout
+      - get_poetry_deps
+      - install_pa11y
+      - run:
+          name: Starting mkdocs server
+          command: poetry run mkdocs serve
+          background: true
+      - run: poetry run .circleci/pa11y.sh
+      - store_test_results:
+          path: reports
+
+workflows:
+  version: 2
+  main:
+    jobs:
+      - docs_a11y:
+          name: Documentation site (jrnl.sh) accessibility
+      - linting:
+          name: Linting and Formatting
+      - test_37_linux:
+          name: Python 3.7 - Linux
+      - test_38_linux:
+          name: Python 3.8 - Linux
+      - test_39_linux:
+          name: Python 3.9 - Linux
+      - test_37_mac:
+          name: Python 3.7 - Mac
+      - test_38_mac:
+          name: Python 3.8 - Mac
+      - test_39_mac:
+          name: Python 3.9 - Mac
diff --git a/.circleci/pa11y.sh b/.circleci/pa11y.sh
new file mode 100755
index 00000000..b3d5abc3
--- /dev/null
+++ b/.circleci/pa11y.sh
@@ -0,0 +1,19 @@
+#! /bin/bash
+set +e
+
+reports_dir="reports/pa11y"
+site_url="http://127.0.0.1:8000"
+exit_code=0
+
+mkdocs build
+mkdir -p "$reports_dir"
+
+printf -- 'scanning: /\n'
+./node_modules/.bin/pa11y "$site_url" --reporter junit > "$reports_dir/root.xml" || exit_code=2
+
+for file in $(xq '.urlset.url[].loc' site/sitemap.xml -r | sed -r 's!https://jrnl.sh/(.*?)/$!\1!'); do
+  printf -- 'scanning: /%s\n' "$file"
+  ./node_modules/.bin/pa11y "$site_url/$file" --reporter junit > "$reports_dir/$file.xml" || exit_code=2
+done
+
+exit $exit_code
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 00000000..ea79d0f2
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,192 @@
+dist: xenial   # required for Python >= 3.7
+os: linux
+language: python
+
+cache:
+  pip: true
+  directories:
+    - $HOME/virtualenv
+
+git:
+  depth: false
+  autocrlf: false
+
+before_install:
+  - date
+
+install:
+  - pip install --upgrade poetry
+  - poetry config virtualenvs.in-project true
+  - poetry config --list
+  - poetry install
+  - poetry run python --version
+
+script:
+  - poetry run pytest
+  - poetry run behave
+
+aliases:
+  test_mac: &test_mac
+    os: osx
+    language: shell
+    osx_image: xcode11.2
+    cache:
+      directories:
+        - $HOME/.pyenv/versions
+        - $HOME/Library/Caches/pypoetry
+    before_install:
+      - brew upgrade pyenv
+      - eval "$(pyenv init -)"
+      - pyenv install -s $JRNL_PYTHON_VERSION
+      - pyenv global $JRNL_PYTHON_VERSION
+      - pip install --upgrade pip
+      - pip --version
+  test_windows: &test_windows
+    os: windows
+    language: shell
+    env: &env_windows
+      PATH: /c/Python37:/c/Python37/Scripts:/c/Python38:/c/Python38/Scripts:/c/Python39:/c/Python39/Scripts:/c/Python310:/c/Python310/Scripts:$PATH
+      PYTHONIOENCODING: UTF-8
+    cache:
+      directories:
+        - /c/Python37
+        - /c/Python38
+        - /c/Python39
+        - /c/Python310
+        - /c/ProgramData/chocolatey/lib
+        - /c/ProgramData/chocolatey/bin
+        - /c/Users/travis/AppData/Local/pypoetry/Cache
+    before_install:
+      - choco install python --version $JRNL_PYTHON_VERSION
+      - python -m pip install --upgrade pip
+      - pip --version
+
+jobs:
+  fast_finish: true
+  allow_failures:
+    - name: Python 3.10 on Windows
+    - name: Python 3.10 on Linux
+    - name: Python 3.10 on MacOS
+    - python: nightly
+
+  include:
+    - name: Misc Linting
+      python: 3.8
+      script:
+        - poetry --version
+        - poetry check
+        - black --version
+        - black --check --diff .
+        - pyflakes --version
+        - pyflakes .
+
+    # Python 3.7 Tests
+    - name: Python 3.7 on Linux
+      python: 3.7
+    - <<: *test_mac
+      name: Python 3.7 on MacOS
+      python: 3.7
+      env:
+        JRNL_PYTHON_VERSION: 3.7.7
+    - <<: *test_windows
+      name: Python 3.7 on Windows
+      python: 3.7
+      env:
+        <<: *env_windows
+        JRNL_PYTHON_VERSION: 3.7.7
+
+    # Python 3.8 Tests
+    - name: Python 3.8 on Linux
+      python: 3.8
+    - <<: *test_mac
+      name: Python 3.8 on MacOS
+      python: 3.8
+      env:
+        JRNL_PYTHON_VERSION: 3.8.2
+    - <<: *test_windows
+      name: Python 3.8 on Windows
+      python: 3.8
+      env:
+        <<: *env_windows
+        JRNL_PYTHON_VERSION: 3.8.2
+
+    # Python 3.9 Tests
+    - name: Python 3.9 on Linux
+      python: 3.9-dev
+    - <<: *test_mac
+      name: Python 3.9 on MacOS
+      env:
+        JRNL_PYTHON_VERSION: 3.9.0
+    - <<: *test_windows
+      name: Python 3.9 on Windows
+      python: 3.9
+      env:
+        <<: *env_windows
+        JRNL_PYTHON_VERSION: 3.9.0
+
+    # Python 3.10 Tests
+    - name: Python 3.10 on Linux
+      before_install:
+        - pip install toml
+        - python .build/allow_all_python_version.py
+      python: 3.10-dev
+    - <<: *test_mac
+      name: Python 3.10 on MacOS
+      before_install:
+        - brew upgrade pyenv
+        - eval "$(pyenv init -)"
+        - pyenv install -s $JRNL_PYTHON_VERSION
+        - pyenv global $JRNL_PYTHON_VERSION
+        - pip install --upgrade pip
+        - pip --version
+        - pip install toml
+        - python .build/allow_all_python_version.py
+      env:
+        JRNL_PYTHON_VERSION: 3.10-dev
+    - <<: *test_windows
+      name: Python 3.10 on Windows
+      before_install:
+        - choco install python --pre
+        - python --version
+        - python -m pip install --upgrade pip
+        - pip --version
+        - pip install toml
+        - python .build/allow_all_python_version.py
+      python: 3.10
+      env:
+        <<: *env_windows
+        JRNL_PYTHON_VERSION: 3.10.0-a1
+
+    # ... and beyond!
+    - name: Python nightly on Linux
+      before_install:
+        - python .build/allow_all_python_version.py
+      python: nightly
+
+    # Specialty tests
+    - name: Python 3.7 on Linux, not UTC
+      python: 3.7
+      env:
+        TZ: America/Edmonton
+
+    - stage: Deploy
+      if: tag IS present
+      before_deploy:
+        - poetry build
+      script:
+        - echo "Deployment starting..."
+      deploy:
+        - provider: script
+          script: poetry publish
+          skip_cleanup: true
+          on:
+            all_branches: true
+
+    # Changelog for Unreleased changes
+    - stage: Update Changelog
+      if: (tag IS present) OR (branch = develop AND type NOT IN (pull_request))
+      install:
+        - echo 'Skipping installation step'
+      script:
+        - ./.build/generate_changelog.sh
+