Ron de Bruin has some tips/links at:
http://www.rondebruin.nl/calendar.htm

Elf_chick wrote:

I am doing a spreadsheet with dates and instead of individually typing in
each and every one, I was wondering if there was an add-in that when you
click on the cell, a calendar pops up and you choose the date. Kind of like
when you're in Access and you click on the date and the calendar appears and
you can choose what ever date you want.

--

Dave Peterson