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2028 week numbers · ISO 8601

Week Numbers for 2028 — ISO Week List

Complete list of ISO week numbers for 2028 — 52 weeks, each with its Monday start date, Sunday end date, and the Unix epoch timestamps for the start and end of the week. Weeks run Monday to Sunday per ISO 8601. This is a 52-week year.

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Week numbers for 2028

2028 has 52 ISO weeks. Week 1 starts on Jan 03, 2028 and week 52 ends on Dec 31, 2028. Each week below shows its ISO week number, the Monday start date, the Sunday end date, and the Unix epoch timestamp for the start of the week (00:00 UTC on Monday). Weeks are numbered per ISO 8601, where week 1 is the week containing the first Thursday of the year and every week runs Monday to Sunday.

Week # ISO year Monday start Sunday end Start epoch (UTC) End epoch (UTC)
1 2028 Jan 03, 2028 Jan 09, 2028 1830470400 1830988800
2 2028 Jan 10, 2028 Jan 16, 2028 1831075200 1831593600
3 2028 Jan 17, 2028 Jan 23, 2028 1831680000 1832198400
4 2028 Jan 24, 2028 Jan 30, 2028 1832284800 1832803200
5 2028 Jan 31, 2028 Feb 06, 2028 1832889600 1833408000
6 2028 Feb 07, 2028 Feb 13, 2028 1833494400 1834012800
7 2028 Feb 14, 2028 Feb 20, 2028 1834099200 1834617600
8 2028 Feb 21, 2028 Feb 27, 2028 1834704000 1835222400
9 2028 Feb 28, 2028 Mar 05, 2028 1835308800 1835827200
10 2028 Mar 06, 2028 Mar 12, 2028 1835913600 1836432000
11 2028 Mar 13, 2028 Mar 19, 2028 1836518400 1837036800
12 2028 Mar 20, 2028 Mar 26, 2028 1837123200 1837641600
13 2028 Mar 27, 2028 Apr 02, 2028 1837728000 1838246400
14 2028 Apr 03, 2028 Apr 09, 2028 1838332800 1838851200
15 2028 Apr 10, 2028 Apr 16, 2028 1838937600 1839456000
16 2028 Apr 17, 2028 Apr 23, 2028 1839542400 1840060800
17 2028 Apr 24, 2028 Apr 30, 2028 1840147200 1840665600
18 2028 May 01, 2028 May 07, 2028 1840752000 1841270400
19 2028 May 08, 2028 May 14, 2028 1841356800 1841875200
20 2028 May 15, 2028 May 21, 2028 1841961600 1842480000
21 2028 May 22, 2028 May 28, 2028 1842566400 1843084800
22 2028 May 29, 2028 Jun 04, 2028 1843171200 1843689600
23 2028 Jun 05, 2028 Jun 11, 2028 1843776000 1844294400
24 2028 Jun 12, 2028 Jun 18, 2028 1844380800 1844899200
25 2028 Jun 19, 2028 Jun 25, 2028 1844985600 1845504000
26 2028 Jun 26, 2028 Jul 02, 2028 1845590400 1846108800
27 2028 Jul 03, 2028 Jul 09, 2028 1846195200 1846713600
28 2028 Jul 10, 2028 Jul 16, 2028 1846800000 1847318400
29 2028 Jul 17, 2028 Jul 23, 2028 1847404800 1847923200
30 2028 Jul 24, 2028 Jul 30, 2028 1848009600 1848528000
31 2028 Jul 31, 2028 Aug 06, 2028 1848614400 1849132800
32 2028 Aug 07, 2028 Aug 13, 2028 1849219200 1849737600
33 2028 Aug 14, 2028 Aug 20, 2028 1849824000 1850342400
34 2028 Aug 21, 2028 Aug 27, 2028 1850428800 1850947200
35 2028 Aug 28, 2028 Sep 03, 2028 1851033600 1851552000
36 2028 Sep 04, 2028 Sep 10, 2028 1851638400 1852156800
37 2028 Sep 11, 2028 Sep 17, 2028 1852243200 1852761600
38 2028 Sep 18, 2028 Sep 24, 2028 1852848000 1853366400
39 2028 Sep 25, 2028 Oct 01, 2028 1853452800 1853971200
40 2028 Oct 02, 2028 Oct 08, 2028 1854057600 1854576000
41 2028 Oct 09, 2028 Oct 15, 2028 1854662400 1855180800
42 2028 Oct 16, 2028 Oct 22, 2028 1855267200 1855785600
43 2028 Oct 23, 2028 Oct 29, 2028 1855872000 1856390400
44 2028 Oct 30, 2028 Nov 05, 2028 1856476800 1856995200
45 2028 Nov 06, 2028 Nov 12, 2028 1857081600 1857600000
46 2028 Nov 13, 2028 Nov 19, 2028 1857686400 1858204800
47 2028 Nov 20, 2028 Nov 26, 2028 1858291200 1858809600
48 2028 Nov 27, 2028 Dec 03, 2028 1858896000 1859414400
49 2028 Dec 04, 2028 Dec 10, 2028 1859500800 1860019200
50 2028 Dec 11, 2028 Dec 17, 2028 1860105600 1860624000
51 2028 Dec 18, 2028 Dec 24, 2028 1860710400 1861228800
52 2028 Dec 25, 2028 Dec 31, 2028 1861315200 1861833600

Epoch columns are UTC: "Start" is 00:00:00 on the Monday, "End" is 00:00:00 on the Sunday — the first second of the last day, not the last second of the week. For week 1 of 2028, that end value is 1830988800; add 604,799 to any start epoch to land on the week's final second (Sunday 23:59:59).

How to read this table

  • Week # — the ISO 8601 week number for that week.
  • ISO year — the ISO week-numbering year this week belongs to (can differ from the calendar year for a few edge days).
  • Monday start — the date of the Monday that starts the week, in UTC.
  • Sunday end — the date of the Sunday that ends the week, in UTC.
  • Start epoch (UTC) — Unix timestamp for 00:00 UTC on Monday.
  • End epoch (UTC) — Unix timestamp for 00:00 UTC on Sunday.

Reading 2028's weeks as epoch ranges

A Unix timestamp pins an instant; an ISO week names a seven-day span. Reporting tools constantly translate between the two — a log line becomes "week 9", or a weekly report becomes an epoch range to query. In 2028, that mapping is concrete: week 1 opens at epoch 1830470400, and week 52 closes at 1862438399, the final second of Sunday, Dec 31, 2028.

  • Epoch 1830470400 → 00:00 UTC on Monday of week 1 (Jan 03, 2028).
  • Epoch 1862438399 → 23:59:59 UTC on Sunday of week 52 — one second before 1862438400 would tick over to the next ISO year's week 1.
  • Any week's span → its start epoch up to start + 604,799 seconds; exactly 604,800 seconds per week, no exceptions (UTC has no DST).

Why 2028 has 52 weeks

The count falls out of one rule: ISO week 1 is the week containing the first Thursday, and weeks run Monday–Sunday. 2028 starts on a Saturday, which keeps it a 52-week year; the days after week 52 belong to week 1 of 2029. December 31, $2028 closes on a $Sunday, and the last week ends $on Dec 31, 2028, still inside 2028

How 2028's weeks line up against neighboring years

The same calendar date rarely keeps its week number from one year to the next, because each January 1 lands on a different weekday. March 1, 2028 sits in ISO week 9; in 2027 and 2029 it will sit one week off in either direction. The tables for the adjacent years make the drift visible:

Examples: 2028's weeks at the epoch boundaries

  • January 1, 2028 (Saturday) falls in ISO week 52 of ISO year 2027 — the ISO year differs from the calendar year, exactly as the rule predicts.
  • December 31, 2028 (Sunday) falls in ISO week 52 of ISO year 2028.
  • March 1, 2028 sits in ISO week 9 — the sort of date whose week number shifts year to year.

Week Numbers for 2028 — ISO Week List — questions from actual use

What are the week numbers for 2028?

2028 has 52 ISO weeks. Week 1 runs Jan 03, 2028 to Jan 09, 2028, and week 52 runs Dec 25, 2028 to Dec 31, 2028.

Is 2028 a 52-week or 53-week year?

2028 is a 52-week year (January 1 was a Saturday). The next 53-week year is 2032, because its January 1 falls on the right weekday to spill into a 53rd week.

When do 2028's week numbers and dates disagree?

Day-of-year and week-of-year counting disagree at the edges. January 1, 2028 (Saturday) sits in ISO week 1 of 2028, and December 31 (Sunday) lands in week 52 of 2028. The ISO year owns the days its weeks' Thursdays fall in, so a few days each December and January always belong to the neighboring year.

What epoch timestamps belong to a week in 2028?

Each week on this page shows two Unix timestamps: 00:00 UTC on its Monday (the start) and 00:00 UTC on its Sunday. For 2028, those run from 1830470400 for the start of week 1 to 1862438399 for the last second of week 52 — a span of exactly 31,449,600 seconds across 52 weeks.

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Sources & references

Around the 2028 week calendar

Neighbor years, the same days as day numbers, and the background behind the epoch values:

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