I need a cell to only return "Due for Calibration" starting at the begining of the month it's due.

There are 3 different pieces of equipment. One is calibrated ever 90 days, another is every 6 months, and the other is annually.

I will have a column for Last Date Calibrated.

I will print the spreedsheet at the begining of each month and want it to show what is Due for Calibration for that month.

Thanks,