Current Week

See the current ISO calendar week based on your device clock, including the full date span and your timezone.

Current calendar week

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Monday – Sunday

Calculated from your local device time.

Based on your device time

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Local timezone

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Date span

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We only use the time on your device, automatically adapting to daylight saving changes.

What this tool does

The calendar week tool determines the current ISO week from the device clock and shows its date range from Monday through Sunday.

How to use the tool

  1. Open the page and review the week number, start date, and end date.
  2. Refresh the calculation after changing the device time or timezone.
  3. Use the ISO week in planning, reports, or schedule discussions.

Useful applications

  • Looking up calendar weeks for project planning and work reports.
  • Checking date ranges for a weekly view or data analysis.
  • Comparing a local week number with an international document.

Notes and limitations

  • ISO weeks start on Monday, and the first week is the one containing the year’s first Thursday.
  • The result follows the device clock and can be wrong when the clock or timezone is configured incorrectly.

Frequently asked questions

When does an ISO calendar week start?

An ISO week starts on Monday. Week 1 is the week containing the first Thursday of the year.

More tools in Date & Time

View all tools in Date & Time