Upcoming calender problem

[orange]

The Upcoming Birthdays bit of the calendar doens't seem to display any of the birthdays on the 31st. I've got the problem on my forum but it's also evident here - if you look at the moment, it's displaying birthdays on 29th May and 1st June, but not the ones on May 31st. Memorial Day is also not showing up in the "Upcoming calender" bar.

[[Unknown]]

 ! The calendar wasn't showing events, birthdays, etc. on the last day of the month.

-[Unknown]

[Elijah Bliss]

I've noticed the same problem.