VB6 makes it delightfully easy to work with dates (that is until some-time in 2030 when the dates will do another millennium bug thing) - use the built in Date type (actually holds time and date, not just date), and you can manipulate it like so:
Dim MyDate as Date
MyDate = "January 17, 1988" ' String date
MsgBox MyDate
MyDate = Vba.Now ' Current Time/Date
MsgBox "This is the " & Vba.Day(MyDate) & " of the month" ' Example of built in date function
MyDate = DateAdd("d",12,MyDate)
MsgBox "Twelve Days from now will be " & MyDate Most other methods should be obvious, though have a look at the Object Inspector or MSDN if you get stuck.