Group numbers into workable ranges in order to run a pivot table (days taken to update)

Hi there,

Cells in row C have numbers (number of days between date a and date b)

I want to group the days so I can run a usable pivot table as follows:

Up to 7 days between update date and today (ie 1 week)
8-14 days between update date and today (ie 2 weeks)
15-21 days (ie 3 weeks)
4 weeks +

My attempt is as follows but only give two results and not 4?

=IF(OR(C2<=7),"1-7days",IF(OR(C2>=8,C2<=14),"8-14days",IF(OR(C2<=21,C2>=15),"15-21days","Over4weeks")))

Any help would be great. Thanks, B.

Dear XOR LX, I have no idea how this does what it does but it works!

Thank you.