DM-39731: Use DATE-BEG

[timj]

No description provided.

[codecov]

Codecov Report

Patch coverage: 91.48% and project coverage change: +0.07 🎉

Comparison is base (d0d831f) 78.58% compared to head (4c2d60a) 78.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
+ Coverage   78.58%   78.66%   +0.07%     
==========================================
  Files          36       36              
  Lines        3110     3131      +21     
  Branches      665      667       +2     
==========================================
+ Hits         2444     2463      +19     
- Misses        544      546       +2     
  Partials      122      122              

Impacted Files	Coverage Δ
python/astro_metadata_translator/bin/writeindex.py	0.00% <0.00%> (ø)
...thon/astro_metadata_translator/bin/writesidecar.py	0.00% <0.00%> (ø)
...hon/astro_metadata_translator/cli/astrometadata.py	0.00% <0.00%> (ø)
tests/test_groups.py	96.36% <ø> (ø)
python/astro_metadata_translator/tests.py	81.08% <66.66%> (+0.17%)	⬆️
python/astro_metadata_translator/file_helpers.py	73.63% <80.00%> (+0.24%)	⬆️
python/astro_metadata_translator/translator.py	77.57% <96.42%> (+0.05%)	⬆️
...n/astro_metadata_translator/bin/translateheader.py	58.11% <100.00%> (+0.36%)	⬆️
python/astro_metadata_translator/headers.py	93.58% <100.00%> (ø)
python/astro_metadata_translator/indexing.py	70.58% <100.00%> (+0.21%)	⬆️
... and 11 more

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