How soon after I return from service do I need to contact my employer about reemployment?

The amount of time between completion of military service and return to civilian employment depends on the length of service. If you served for less than 31 days, you must return to work during the next regularly scheduled work period on the first full day after release from service. The employer must take into account the safe travel home and an eight-hour rest period for the employee prior to return. 

For service longer than 30 days but less than 181 days, the service member has up to 14 days from release from military service to apply for reemployment. If the service member served longer than 180 days, he or she has up to 90 days from release from service to apply for reemployment.