This article explains how to correct a timesheet that has been entered under the wrong period ending date in Abtrac. It outlines how administrators can use the Bulk Edit Timesheets report to locate and update timesheet entries so they are associated with the correct period. The guide also covers the conditions required to change a period ending date—such as ensuring the timesheet has not already been invoiced—and explains how to enable the Period Ending Date column in the maintenance screen if it is not visible. In addition, it describes alternative ways users can change the week ending date within certain timesheet views and highlights system settings that help prevent time being entered outside the correct timesheet period.