ISO Week Numbers 2028

Find ISO week numbers and Monday-to-Sunday date ranges for 2028. The current week is calculated using the UTC calendar date; each ISO year contains 52 or 53 complete weeks.

Week 43, 2026

Oct 21, 2026 · UTC · 52 ISO weeks in 2028

Week dates in 2028

ISO week	Monday	Sunday
2028-W01	Jan 3, 2028	Jan 9, 2028
2028-W02	Jan 10, 2028	Jan 16, 2028
2028-W03	Jan 17, 2028	Jan 23, 2028
2028-W04	Jan 24, 2028	Jan 30, 2028
2028-W05	Jan 31, 2028	Feb 6, 2028
2028-W06	Feb 7, 2028	Feb 13, 2028
2028-W07	Feb 14, 2028	Feb 20, 2028
2028-W08	Feb 21, 2028	Feb 27, 2028
2028-W09	Feb 28, 2028	Mar 5, 2028
2028-W10	Mar 6, 2028	Mar 12, 2028
2028-W11	Mar 13, 2028	Mar 19, 2028
2028-W12	Mar 20, 2028	Mar 26, 2028
2028-W13	Mar 27, 2028	Apr 2, 2028
2028-W14	Apr 3, 2028	Apr 9, 2028
2028-W15	Apr 10, 2028	Apr 16, 2028
2028-W16	Apr 17, 2028	Apr 23, 2028
2028-W17	Apr 24, 2028	Apr 30, 2028
2028-W18	May 1, 2028	May 7, 2028
2028-W19	May 8, 2028	May 14, 2028
2028-W20	May 15, 2028	May 21, 2028
2028-W21	May 22, 2028	May 28, 2028
2028-W22	May 29, 2028	Jun 4, 2028
2028-W23	Jun 5, 2028	Jun 11, 2028
2028-W24	Jun 12, 2028	Jun 18, 2028
2028-W25	Jun 19, 2028	Jun 25, 2028
2028-W26	Jun 26, 2028	Jul 2, 2028
2028-W27	Jul 3, 2028	Jul 9, 2028
2028-W28	Jul 10, 2028	Jul 16, 2028
2028-W29	Jul 17, 2028	Jul 23, 2028
2028-W30	Jul 24, 2028	Jul 30, 2028
2028-W31	Jul 31, 2028	Aug 6, 2028
2028-W32	Aug 7, 2028	Aug 13, 2028
2028-W33	Aug 14, 2028	Aug 20, 2028
2028-W34	Aug 21, 2028	Aug 27, 2028
2028-W35	Aug 28, 2028	Sep 3, 2028
2028-W36	Sep 4, 2028	Sep 10, 2028
2028-W37	Sep 11, 2028	Sep 17, 2028
2028-W38	Sep 18, 2028	Sep 24, 2028
2028-W39	Sep 25, 2028	Oct 1, 2028
2028-W40	Oct 2, 2028	Oct 8, 2028
2028-W41	Oct 9, 2028	Oct 15, 2028
2028-W42	Oct 16, 2028	Oct 22, 2028
2028-W43	Oct 23, 2028	Oct 29, 2028
2028-W44	Oct 30, 2028	Nov 5, 2028
2028-W45	Nov 6, 2028	Nov 12, 2028
2028-W46	Nov 13, 2028	Nov 19, 2028
2028-W47	Nov 20, 2028	Nov 26, 2028
2028-W48	Nov 27, 2028	Dec 3, 2028
2028-W49	Dec 4, 2028	Dec 10, 2028
2028-W50	Dec 11, 2028	Dec 17, 2028
2028-W51	Dec 18, 2028	Dec 24, 2028
2028-W52	Dec 25, 2028	Dec 31, 2028

Frequently asked questions

Which day starts the week?

Each calendar row starts on Monday and ends on Sunday, following ISO 8601.

How are ISO week numbers assigned?

Week 1 contains January 4, or equivalently the first Thursday of the year. Dates at either end of a year can belong to the adjacent ISO week-year.

Why do some years have 53 weeks?

An ISO year has 53 weeks when January 1 is a Thursday, or when a leap year starts on Wednesday.