Federal Work Study Payroll Calendar The FWS payroll takes place in the Office of Financial Aid on a biweekly basis. Timesheets are submitted every two weeks on the Monday following the end date Pay Period, for the prior fourteen days worked. The FWS Payroll Calendar includes important dates such as the Pay Period (begin and end date), Timesheet Deadline and Pay Day. Training Training and orientations will be conducted through the financial aid office. Notifications and invitations will be sent to participants.