Why is the effective date necessary to know for a per diem calculator to work properly?
The effective date is a date that applies to per diem rates. It is important because it shows the first date that CONUS or OCONUS per diem rates is valid. The effective date, the expiration date, the seasonal start date, and the seasonal end date should all be checked against the date of each layover that gets included in a pilot or flight attendants layovers for M&IE.
