Tests fail after 2025-12-31

[bmwiedemann]

While working on reproducible builds for openSUSE, I found that
our python-dateparser 1.2.2 package fails its tests when run after 2026-01-01T01:06:13

 self = <tests.test_search.TestTranslateSearch testMethod=test_search_dates_with_prepositions>

     def test_search_dates_with_prepositions(self):
         """Test `search_dates` for parsing Russian date ranges with prepositions and language detection."""
         result = search_dates(
             "Сервис будет недоступен с 12 января по 30 апреля.",
             add_detected_language=True,
             languages=["ru"],
         )
         expected = [
             ("12 января", datetime.datetime(2025, 1, 12, 0, 0), "ru"),
             ("30 апреля", datetime.datetime(2025, 4, 30, 0, 0), "ru"),
         ]   
 >       assert result == expected
 E       AssertionError: assert [('12 января'... 0, 0), 'ru')] == [('12 января'... 0, 0), 'ru')]
 E       
 E         At index 0 diff: ('12 января', datetime.datetime(2041, 1, 12, 0, 0), 'ru') != ('12 января', datetime.datetime(2025, 1, 12, 0, 0), 'ru')
 E           
 E         Full diff:
 E           [
 E               (
 E                   '12 января',...
 E         
 E         ...Full output truncated (15 lines hidden), use '-vv' to show

Tests should keep working in the future. e.g. you could mock the current time.