Week numbers 2027: ISO weeks with dates
2027 has 52 ISO weeks. Week 1 runs from Jan 4, 2027 to Jan 10, and week 52 ends on Jan 2, 2028. Weeks start on Monday.
All ISO weeks of 2027
| Week | Monday | Sunday |
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| 1 | Jan 4, 2027 | Jan 10, 2027 |
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| 2 | Jan 11, 2027 | Jan 17, 2027 |
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| 3 | Jan 18, 2027 | Jan 24, 2027 |
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| 4 | Jan 25, 2027 | Jan 31, 2027 |
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| 5 | Feb 1, 2027 | Feb 7, 2027 |
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| 6 | Feb 8, 2027 | Feb 14, 2027 |
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| 7 | Feb 15, 2027 | Feb 21, 2027 |
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| 8 | Feb 22, 2027 | Feb 28, 2027 |
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| 9 | Mar 1, 2027 | Mar 7, 2027 |
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| 10 | Mar 8, 2027 | Mar 14, 2027 |
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| 11 | Mar 15, 2027 | Mar 21, 2027 |
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| 12 | Mar 22, 2027 | Mar 28, 2027 |
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| 13 | Mar 29, 2027 | Apr 4, 2027 |
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| 14 | Apr 5, 2027 | Apr 11, 2027 |
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| 15 | Apr 12, 2027 | Apr 18, 2027 |
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| 16 | Apr 19, 2027 | Apr 25, 2027 |
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| 17 | Apr 26, 2027 | May 2, 2027 |
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| 18 | May 3, 2027 | May 9, 2027 |
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| 19 | May 10, 2027 | May 16, 2027 |
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| 20 | May 17, 2027 | May 23, 2027 |
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| 21 | May 24, 2027 | May 30, 2027 |
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| 22 | May 31, 2027 | Jun 6, 2027 |
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| 23 | Jun 7, 2027 | Jun 13, 2027 |
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| 24 | Jun 14, 2027 | Jun 20, 2027 |
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| 25 | Jun 21, 2027 | Jun 27, 2027 |
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| 26 | Jun 28, 2027 | Jul 4, 2027 |
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| 27 | Jul 5, 2027 | Jul 11, 2027 |
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| 28 | Jul 12, 2027 | Jul 18, 2027 |
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| 29 | Jul 19, 2027 | Jul 25, 2027 |
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| 30 | Jul 26, 2027 | Aug 1, 2027 |
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| 31 | Aug 2, 2027 | Aug 8, 2027 |
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| 32 | Aug 9, 2027 | Aug 15, 2027 |
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| 33 | Aug 16, 2027 | Aug 22, 2027 |
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| 34 | Aug 23, 2027 | Aug 29, 2027 |
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| 35 | Aug 30, 2027 | Sep 5, 2027 |
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| 36 | Sep 6, 2027 | Sep 12, 2027 |
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| 37 | Sep 13, 2027 | Sep 19, 2027 |
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| 38 | Sep 20, 2027 | Sep 26, 2027 |
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| 39 | Sep 27, 2027 | Oct 3, 2027 |
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| 40 | Oct 4, 2027 | Oct 10, 2027 |
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| 41 | Oct 11, 2027 | Oct 17, 2027 |
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| 42 | Oct 18, 2027 | Oct 24, 2027 |
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| 43 | Oct 25, 2027 | Oct 31, 2027 |
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| 44 | Nov 1, 2027 | Nov 7, 2027 |
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| 45 | Nov 8, 2027 | Nov 14, 2027 |
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| 46 | Nov 15, 2027 | Nov 21, 2027 |
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| 47 | Nov 22, 2027 | Nov 28, 2027 |
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| 48 | Nov 29, 2027 | Dec 5, 2027 |
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| 49 | Dec 6, 2027 | Dec 12, 2027 |
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| 50 | Dec 13, 2027 | Dec 19, 2027 |
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| 51 | Dec 20, 2027 | Dec 26, 2027 |
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| 52 | Dec 27, 2027 | Jan 2, 2028 |
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Calendar with week numbers
Mondays show the ISO week number under the date.
January | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | | 1 | 2 | 3 |
| 4W1 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11W2 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18W3 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25W4 | 26 | 27 | 28 | 29 | 30 | 31 |
February | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| 1W5 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8W6 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15W7 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22W8 | 23 | 24 | 25 | 26 | 27 | 28 |
March | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| 1W9 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8W10 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15W11 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22W12 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29W13 | 30 | 31 | | | | |
April | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | 1 | 2 | 3 | 4 |
| 5W14 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12W15 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19W16 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26W17 | 27 | 28 | 29 | 30 | | |
May | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | | | 1 | 2 |
| 3W18 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10W19 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17W20 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24W21 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31W22 | | | | | | |
June | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
| 7W23 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14W24 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21W25 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28W26 | 29 | 30 | | | | |
July | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | 1 | 2 | 3 | 4 |
| 5W27 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12W28 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19W29 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26W30 | 27 | 28 | 29 | 30 | 31 | |
August | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | | | | 1 |
| 2W31 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9W32 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16W33 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23W34 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30W35 | 31 | | | | | |
September | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | 1 | 2 | 3 | 4 | 5 |
| 6W36 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13W37 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20W38 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27W39 | 28 | 29 | 30 | | | |
October | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | | | 1 | 2 | 3 |
| 4W40 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11W41 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18W42 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25W43 | 26 | 27 | 28 | 29 | 30 | 31 |
November | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| 1W44 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8W45 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15W46 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22W47 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29W48 | 30 | | | | | |
December | Mo | Tu | We | Th | Fr | Sa | Su |
|---|
| | 1 | 2 | 3 | 4 | 5 |
| 6W49 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13W50 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20W51 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27W52 | 28 | 29 | 30 | 31 | | |