Week numbers for 2027

2027 has 52 weeks. Week 1 starts on Monday, January 4, 2027.

All weeks in 2027

WeekStarts (Mon)Ends (Sun)
Week 1Mon, Jan 4, 2027Sun, Jan 10, 2027
Week 2Mon, Jan 11, 2027Sun, Jan 17, 2027
Week 3Mon, Jan 18, 2027Sun, Jan 24, 2027
Week 4Mon, Jan 25, 2027Sun, Jan 31, 2027
Week 5Mon, Feb 1, 2027Sun, Feb 7, 2027
Week 6Mon, Feb 8, 2027Sun, Feb 14, 2027
Week 7Mon, Feb 15, 2027Sun, Feb 21, 2027
Week 8Mon, Feb 22, 2027Sun, Feb 28, 2027
Week 9Mon, Mar 1, 2027Sun, Mar 7, 2027
Week 10Mon, Mar 8, 2027Sun, Mar 14, 2027
Week 11Mon, Mar 15, 2027Sun, Mar 21, 2027
Week 12Mon, Mar 22, 2027Sun, Mar 28, 2027
Week 13Mon, Mar 29, 2027Sun, Apr 4, 2027
Week 14Mon, Apr 5, 2027Sun, Apr 11, 2027
Week 15Mon, Apr 12, 2027Sun, Apr 18, 2027
Week 16Mon, Apr 19, 2027Sun, Apr 25, 2027
Week 17Mon, Apr 26, 2027Sun, May 2, 2027
Week 18Mon, May 3, 2027Sun, May 9, 2027
Week 19Mon, May 10, 2027Sun, May 16, 2027
Week 20Mon, May 17, 2027Sun, May 23, 2027
Week 21Mon, May 24, 2027Sun, May 30, 2027
Week 22Mon, May 31, 2027Sun, Jun 6, 2027
Week 23Mon, Jun 7, 2027Sun, Jun 13, 2027
Week 24Mon, Jun 14, 2027Sun, Jun 20, 2027
Week 25Mon, Jun 21, 2027Sun, Jun 27, 2027
Week 26Mon, Jun 28, 2027Sun, Jul 4, 2027
Week 27Mon, Jul 5, 2027Sun, Jul 11, 2027
Week 28Mon, Jul 12, 2027Sun, Jul 18, 2027
Week 29Mon, Jul 19, 2027Sun, Jul 25, 2027
Week 30Mon, Jul 26, 2027Sun, Aug 1, 2027
Week 31Mon, Aug 2, 2027Sun, Aug 8, 2027
Week 32Mon, Aug 9, 2027Sun, Aug 15, 2027
Week 33Mon, Aug 16, 2027Sun, Aug 22, 2027
Week 34Mon, Aug 23, 2027Sun, Aug 29, 2027
Week 35Mon, Aug 30, 2027Sun, Sep 5, 2027
Week 36Mon, Sep 6, 2027Sun, Sep 12, 2027
Week 37Mon, Sep 13, 2027Sun, Sep 19, 2027
Week 38Mon, Sep 20, 2027Sun, Sep 26, 2027
Week 39Mon, Sep 27, 2027Sun, Oct 3, 2027
Week 40Mon, Oct 4, 2027Sun, Oct 10, 2027
Week 41Mon, Oct 11, 2027Sun, Oct 17, 2027
Week 42Mon, Oct 18, 2027Sun, Oct 24, 2027
Week 43Mon, Oct 25, 2027Sun, Oct 31, 2027
Week 44Mon, Nov 1, 2027Sun, Nov 7, 2027
Week 45Mon, Nov 8, 2027Sun, Nov 14, 2027
Week 46Mon, Nov 15, 2027Sun, Nov 21, 2027
Week 47Mon, Nov 22, 2027Sun, Nov 28, 2027
Week 48Mon, Nov 29, 2027Sun, Dec 5, 2027
Week 49Mon, Dec 6, 2027Sun, Dec 12, 2027
Week 50Mon, Dec 13, 2027Sun, Dec 19, 2027
Week 51Mon, Dec 20, 2027Sun, Dec 26, 2027
Week 52Mon, Dec 27, 2027Sun, Jan 2, 2028

Other years

Questions & answers

What week number is it today?

Today, October 2, 2026, is in ISO week 40 of 2026.

How many weeks are in 2027?

2027 has 52 ISO weeks.

When does the week start?

ISO weeks start on Monday and end on Sunday. Week 1 is the week with the year's first Thursday in it, so it can begin in late December.