Calendar view broken when first day of week is not Sunday
>>> [!note] Migrated issue
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<!-- Migrated from issue #3191954. -->
Reported by: [markfoodyburton](https://www.drupal.org/user/114447)
Related to !77 !76
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Seems like the days selected for a multi-day view are entirely wrong. </p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>Fresh install of drupal 9, fresh install of calendar et al.<br>
Add a single node with a data stretching over a weekend (e.g. Thursday till Tuesday)<br>
Build a monthly view (default), showing the node...<br>
Select multi-column row as the multi-day style - leave everything else a default.<br>
View the calendar - and see the start date and end date are somewhat random, and always in the same week.</p>
<p>Am I using the module wrong, or is this just not supposed to work?</p>
issue