A Work Day, commonly referred to as WD, represents a day designated for regular business operations or workforce activity. These are the days within a calendar week that businesses allocate for their employees to perform designated tasks and achieve workplace goals. Typical work days may vary by region or industry; for instance, Monday through Friday are considered standard work days in many cultures. However, industries that operate on weekends or round-the-clock may define work days differently.

In the context of month-end processes, identifying a work day is critical for organizing tasks such as completing balance sheet reconciliations or fulfilling checklist items. For example, a company may set a deadline to reconcile all accounts by the fifth work day of the month. Understanding and defining the work day within organizational frameworks helps ensure precise scheduling and operational efficiency.