comparing data in two worksheets in w7

[CLINT WILLIAMS]

I am new at this so would appreciate any help. I am trying to compare two cells using if function in sheet1 eg "K" & "L" . k = cell no and L = date to sheet2 which has the same data. if there is a match I want to copy the row to sheet3.

However when matching the date I want the macro to look for the same day or the next day. This also needs to loop as each sheet has thousands of data.

Thanks
Clint