Amends the Service Member Employment and Reemployment Rights Act. In a provision concerning differential compensation, changes the definition of "work days" to mean the actual number of shifts (rather than days) the employee would have worked during the period of military leave but for the service member's military obligation. Further provides that work days are tabulated without regard for the number of hours in a shift (rather than work day), regardless if the shift extends into the next day. Removes a provision providing that work hours that extend into the next calendar day count as 2 work days.