fix: Parse 1mon ago

dateparser/data/date_translation_data/en.py

@@ -100,7 +100,9 @@
     "month": [
         "mo",
         "month",
-        "months"
+        "months",
+        "mon",
+        "mons"
     ],
     "week": [
         "week",
@@ -800,6 +802,9 @@
         "after"
     ],
     "simplifications": [
+        {
+            "(\\d+)\\s*mons?\\b": "\\1 month"
+        },
         {
             "an": "1"
         },

dateparser_data/supplementary_language_data/date_translation_data/en.yaml

@@ -36,6 +36,8 @@ year:
     - years
 month:
     - months
+    - mon
+    - mons
 week:
     - weeks
 day:
@@ -82,6 +84,7 @@ relative-type-regex:
         - (\d+[.,]?\d*) decades? ago
 
 simplifications:
+    - (\d+)\s*mons?\b: \1 month
     - an: '1'
     - a: '1'
     - (?:12\s+)?noon: '12:00'

dateparser_scripts/write_complete_data.py

@@ -28,6 +28,25 @@
 RELATIVE_PATTERN = re.compile(r"\{0\}")
 
 
+def _to_plain_types(obj):
+    """Recursively convert ruamel.yaml CommentedMap/CommentedSeq to plain
+    OrderedDict/list so that json.dumps produces stable output across all
+    Python versions.
+
+    Python 3.14 changed the json C encoder to bypass the Python-level
+    ``__iter__``/``items()`` of dict subclasses and access the underlying C
+    dict directly.  ruamel.yaml's CommentedMap relies on its Python-level
+    iteration for correct key ordering, so the C shortcut produces a
+    different (non-deterministic) key order on 3.14.  Converting to plain
+    types before serialisation avoids the issue entirely.
+    """
+    if isinstance(obj, dict):
+        return OrderedDict((k, _to_plain_types(v)) for k, v in obj.items())
+    elif isinstance(obj, list):
+        return [_to_plain_types(v) for v in obj]
+    return obj
+
+
 def _modify_relative_data(relative_data):
     modified_relative_data = OrderedDict()
     for key, value in relative_data.items():
@@ -95,6 +114,7 @@ def write_complete_data(in_memory=False):
     for language in all_languages:
         date_translation_data = _get_complete_date_translation_data(language)
         date_translation_data = combine_dicts(date_translation_data, base_data)
+        date_translation_data = _to_plain_types(date_translation_data)
         _modify_data(date_translation_data)
         translation_data = json.dumps(
             date_translation_data, indent=4, separators=(",", ": "), ensure_ascii=False

tests/test_freshness_date_parser.py

@@ -2364,15 +2364,19 @@ def test_dates_not_supported_by_date_time(self, date_string):
 
     @parameterized.expand(
         [
-            param("1mon ago"),  # 1116
+            param("1mon ago", ago={"months": 1}, period="month"),  # 1123
+            param("2mon ago", ago={"months": 2}, period="month"),  # 1123
+            param("3mons ago", ago={"months": 3}, period="month"),  # 1123
         ]
     )
-    def test_known_issues(self, date_string):
+    def test_known_issues(self, date_string, ago, period):
         self.given_parser()
         self.given_date_string(date_string)
         self.when_date_is_parsed()
         self.then_error_was_not_raised()
-        self.assertEqual(None, self.result["date_obj"])
+        self.then_date_was_parsed_by_freshness_parser()
+        self.then_date_obj_is_exactly_this_time_ago(ago)
+        self.then_period_is(period)
 
     @parameterized.expand(
         [