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Week of Year

Get the week number of the year for a date.

Week of Year Calculator

This calculator determines the week number (1-52/53) of a given date.

Use Cases

  • Supply Chain: Manufacturing schedules often run by week number.
  • Payroll: Weekly pay cycles.
  • Project Management: Weekly milestones.

Formula

The week number is calculated based on the ISO 8601 standard or other regional standards, generally counting elapsed full weeks from the start of the year.