Add new -today-in-history, -month, -day, and -year search filters (#1145)

* Introduce -reminisce, -month, -day, and -year
* Update expected_args in parse_args tests
* Add check before creating compare_d
* Misc changes
* Implement testing for -month, -day, -year, and -reminisce
* Compress tests into one Scenario Outline
* Fix failing tests by updating dates_similar journal
* Create 'we set current date and time to' step
* Use time.parse in reminisce
* Update dates_similar journal
* Make 'Searching in a journal' test shorter
* Lint
* Implement reminiscing test
* Add combination tests
* Finalize tests
* Finalize pytests
* Simplify reminisce tests
* Change reminsice help (since it also shows today's entries)
* Re-do tests; use various tests
* Remove old test data
* Better scenario description
* Standardize format for compare_d
* Rename -reminisce to -today-in-history

jrnl/args.py

@@ -176,6 +176,30 @@ def parse_args(args=[]):
     reading.add_argument(
         "-on", dest="on_date", metavar="DATE", help="Show entries on this date"
     )
+    reading.add_argument(
+        "-today-in-history",
+        dest="today_in_history",
+        action="store_true",
+        help="Show entries of today over the years",
+    )
+    reading.add_argument(
+        "-month",
+        dest="month",
+        metavar="DATE",
+        help="Show entries on this month of any year",
+    )
+    reading.add_argument(
+        "-day",
+        dest="day",
+        metavar="DATE",
+        help="Show entries on this day of any month",
+    )
+    reading.add_argument(
+        "-year",
+        dest="year",
+        metavar="DATE",
+        help="Show entries of a specific year",
+    )
     reading.add_argument(
         "-from",
         dest="start_date",