fix: Fix issue where before date could case attribute error.

[bvanelli]

References #68

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.27%. Comparing base (3a5a406) to head (8ee2f71).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #76      +/-   ##
==========================================
+ Coverage   97.21%   97.27%   +0.05%     
==========================================
  Files          14       14              
  Lines        1942     1945       +3     
==========================================
+ Hits         1888     1892       +4     
+ Misses         54       53       -1     

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