Phone alarm

I set my phone calendar to alert me at 9:40 am that I need to check the mice today.  On my way to work, I remembered anyway and erased the calender item.

At 9:40 am, a ring tone that I've never used (one of the upbeat phone ones) alerted me to an event scheduled.  The event?

Name of the event: several "y"s with umlauts (taking up the entire line)

Dates/times: Oct 13, 13652 7:63pm to Feb 31, 4095 11:59pm

Repeated End Time

Until Feb 31 4095

Interesting.

Also, this isn't the first time this has happened.  It did the same thing last time, but that was months ago and I didn't write it down for posterity.