A family of Microsoft relational database management systems designed for ease of use.
I think you need something like
DIM Q AS BYTE
Q = DatePart("q", Date())
If Q = 1 Then CompletedDate1 = Date()
If Q = 2 Then CompletedDate2 = Date()
If Q = 3 Then CompletedDate3 = Date()
If Q = 4 Then CompletedDate4 = Date()