Date/time Views filter tries strotime() relative to Unix epoch

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Removing tests tag as they appear to be added.

But running them locally without the fix
core/modules/datetime/tests/src/Kernel/Views/FilterDateTest.php actually passes. So this test needs to be updated to cover the issue.

Closed 📌 Clarify options for 'offset' on date field filters Closed: won't fix as something we should handle here.

We should update the examples provided by the date field to include an example (or two) of the strings that this change now allows.

Re-rolled for 11.x

I think the issue didn't happen on 11.x, but I also converted patch to git branch for 11.x.
\Drupal\Tests\datetime\Kernel\Views\FilterDateTest::testDateOffsets run without the fix actually passes, the test didn't cover the issue.

I'm seeing this on my server with Drupal 10.3. Time on server is correct. Time in Drupal is an hour out. Set to United Kingdom and UTC.

Tried https://git.drupalcode.org/project/drupal/-/merge_requests/7068.diff but doe not seem to work for me.