alternate date format

[EddyCMWF]

Description

How should alternate date formats be handled?

Contributor Declaration

By opening this pull request, I affirm the following:

• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (feature/enriched-mars-api@26c3598). Learn more about missing BASE report.

Additional details and impacted files

@@                     Coverage Diff                      @@
##             feature/enriched-mars-api     #247   +/-   ##
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  Coverage                             ?   50.40%           
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  Files                                ?      385           
  Lines                                ?    15471           
  Branches                             ?     1312           
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  Hits                                 ?     7798           
  Misses                               ?     7673           
  Partials                             ?        0           

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