Week Number Formula [SOLVED]

Hi the_sleeper

Excel has a function for this, WEEKNUM

Returns a number that indicates where the week falls numerically within a year.

If this function is not available, and returns the #NAME? error, install and load the Analysis ToolPak add-in.

How?

On the Tools menu, click Add-Ins.
In the Add-Ins available list, select the Analysis ToolPak box, and then click OK.
If necessary, follow the instructions in the setup program.
Syntax

WEEKNUM(serial_num,return_type)

Serial_num is a date within the week. Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd day of May, 2008. Problems can occur if dates are entered as text.

Return_type is a number that determines on which day the week begins. The default is 1.