Only include valid dates
Only include valid dates

This fixes an issue where the calendar will jump to the date 0000-00-00
when you start typing.

mirego/Kalendae,coreyzev/Kalendae,scientiacloud/Kalendae,coreyzev/Kalendae,ChiperSoft/Kalendae,ChiperSoft/Kalendae,scientiacloud/Kalendae,mirego/Kalendae,pfiller/Kalendae,IlanFrumer/Kalendae,IlanFrumer/Kalendae