AnyCalendar

AnyCalendar

Today's date in every calendar system

ISO Week Date

ISO 8601 Week

Today

 

 

The ISO week date system is part of the ISO 8601 standard for representing dates. It defines a year as having either 52 or 53 full weeks, with each week starting on Monday. It is widely used in business, government, and manufacturing for scheduling and fiscal planning.

Used in: International (business, industry, government)

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Gregorian months in 2026

The first day of every Gregorian month, with the ISO Week date for the same day.

GregorianISO Week
1 January 20262026-W01-4
1 February 20262026-W05-7
1 March 20262026-W09-7
1 April 20262026-W14-3
1 May 20262026-W18-5
1 June 20262026-W23-1
1 July 20262026-W27-3
1 August 20262026-W31-6
1 September 20262026-W36-2
1 October 20262026-W40-4
1 November 20262026-W44-7
1 December 20262026-W49-2

ISO Week converters

All calendar systems