Thank you.
However, my browser's language is set to English (United Kingdom), which normally gives monotonic dates.
Steps to reproduce:
- In Chromium, go to chrome://settings/languages.
- Under Preferred languages, ensure "English (United Kingdom)" is at the top (position 1) of the list.
- Go to this thread.
- Hover mouse cursor over my username for 2-3 secs, until overlay appears showing my "cake day".
- My "cake day" is shown as 7/23/26, which is non-monotonic.