Pbarb2: Barb, anybody can go and post on the birthday board. Its not just for birthdays, its for any special occasion, if you want to say happy anniversary or happy birthday to someone.
If you have a special date in mind, Volant posts a list at the beginning of the month with birthdays/occasions for that month. If you give her a date she'll add it to the list. But feel free to go and post at any time!