Make t/ui/21-admin-needles.t work for every timezone

[perlpunk]

Issue: https://progress.opensuse.org/issues/167635

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.75%. Comparing base (b638ad7) to head (a84b2f6).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5965      +/-   ##
==========================================
- Coverage   98.75%   98.75%   -0.01%     
==========================================
  Files         396      396              
  Lines       38982    38983       +1     
==========================================
- Hits        38498    38496       -2     
- Misses        484      487       +3     

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[okurz]

I would appreciate a comment for the non obvious code line

[kalikiana]

[  558s] error: %prein(openQA-worker-4.6.1727714539.ff293526-7225.2.x86_64) scriptlet failed, exit status 6
[  558s] error: openQA-worker-4.6.1727714539.ff293526-7225.2.x86_64: install failed

for openSUSE Tumbleweed x86_64, see poo#167587

[okurz]

@Mergifyio rebase

[mergify]

rebase

✅ Branch has been successfully rebased

[perlpunk]

I would appreciate a comment for the non obvious code line

done