Enter event date as YYYY-MM-DD.
Enter a complete calendar date for the event.
Why does this happen?
Event date contains an incomplete date or an invalid calendar day, such as 31 February.
How do I check it?
In Event date, enter the day the event happened as YYYY-MM-DD, for example 2026-10-20 for 20 October 2026.
You can also use the calendar button. It offers dates up to today, starting from the animal’s known birth date, or 30 years ago when no birth date is saved.
Check Title and the event category, choose Save, then check the date in the animal’s history.
How do I verify the result?
The saved entry shows the day the event happened.
How do I keep my records safe?
Use the animal’s actual event date; the example shows the format.