Terms of use

CalendarWeeks is a free, publicly accessible reference site. You do not need an account and there is no charge to use any page.

The site shows the current ISO-8601 week number and the complete calendars of weeks for 2026, 2027 and 2028, including a date finder. The current week updates automatically at the start of each new ISO week.

Week numbers are generated from the ISO-8601 standard and are provided for reference and planning purposes only. We work to keep them accurate, but the site is offered "as is" without warranty of any kind, and we are not liable for decisions made on the basis of it. For legal, contractual or other critical deadlines, please confirm the date with an official source as well.

You are welcome to use the site, link to it and cite the week numbers. Please do not attempt to disrupt or overload the site, scrape it at scale, republish it wholesale as your own work, or use it for any unlawful purpose.

The site is funded by advertising served by third parties, including Google. Adverts are selected by those providers and not by us, and we are not responsible for the products, services or claims they contain. See the privacy policy for how advertising cookies work and how to control them.

The design and written content of this site belong to its publisher. The week numbering itself follows the public ISO-8601 standard. You may quote or link to the site with clear attribution.

Links to other websites are provided for convenience. We do not control those sites and are not responsible for their content.

To the fullest extent permitted by law, we are not liable for any indirect or consequential loss arising from the use of, or inability to use, this site.

These terms may be updated occasionally. The version published on this page, with its "last updated" date, is the version that applies.

Questions, corrections to the calendar data, advertising enquiries and data-protection requests are all welcome.