This calendar shows all 12 months of 2023 with ISO 8601 week numbers (weeks start on Monday).
Hover over any date to see the Unix timestamps for the start and end of that day in UTC or local time. Click a date to pin the popup and copy individual timestamps to the clipboard. Use the toggles to switch between seconds and milliseconds.
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Seconds Milliseconds
UTC Local time
January Wk Mo Tu We Th Fr Sa Su 52 26 27 28 29 30 31 1 1 2 3 4 5 6 7 8 2 9 10 11 12 13 14 15 3 16 17 18 19 20 21 22 4 23 24 25 26 27 28 29 5 30 31 1 2 3 4 5
February Wk Mo Tu We Th Fr Sa Su 5 30 31 1 2 3 4 5 6 6 7 8 9 10 11 12 7 13 14 15 16 17 18 19 8 20 21 22 23 24 25 26 9 27 28 1 2 3 4 5
March Wk Mo Tu We Th Fr Sa Su 9 27 28 1 2 3 4 5 10 6 7 8 9 10 11 12 11 13 14 15 16 17 18 19 12 20 21 22 23 24 25 26 13 27 28 29 30 31 1 2
April Wk Mo Tu We Th Fr Sa Su 13 27 28 29 30 31 1 2 14 3 4 5 6 7 8 9 15 10 11 12 13 14 15 16 16 17 18 19 20 21 22 23 17 24 25 26 27 28 29 30
May Wk Mo Tu We Th Fr Sa Su 18 1 2 3 4 5 6 7 19 8 9 10 11 12 13 14 20 15 16 17 18 19 20 21 21 22 23 24 25 26 27 28 22 29 30 31 1 2 3 4
June Wk Mo Tu We Th Fr Sa Su 22 29 30 31 1 2 3 4 23 5 6 7 8 9 10 11 24 12 13 14 15 16 17 18 25 19 20 21 22 23 24 25 26 26 27 28 29 30 1 2
July Wk Mo Tu We Th Fr Sa Su 26 26 27 28 29 30 1 2 27 3 4 5 6 7 8 9 28 10 11 12 13 14 15 16 29 17 18 19 20 21 22 23 30 24 25 26 27 28 29 30 31 31 1 2 3 4 5 6
August Wk Mo Tu We Th Fr Sa Su 31 31 1 2 3 4 5 6 32 7 8 9 10 11 12 13 33 14 15 16 17 18 19 20 34 21 22 23 24 25 26 27 35 28 29 30 31 1 2 3
September Wk Mo Tu We Th Fr Sa Su 35 28 29 30 31 1 2 3 36 4 5 6 7 8 9 10 37 11 12 13 14 15 16 17 38 18 19 20 21 22 23 24 39 25 26 27 28 29 30 1
October Wk Mo Tu We Th Fr Sa Su 39 25 26 27 28 29 30 1 40 2 3 4 5 6 7 8 41 9 10 11 12 13 14 15 42 16 17 18 19 20 21 22 43 23 24 25 26 27 28 29 44 30 31 1 2 3 4 5
November Wk Mo Tu We Th Fr Sa Su 44 30 31 1 2 3 4 5 45 6 7 8 9 10 11 12 46 13 14 15 16 17 18 19 47 20 21 22 23 24 25 26 48 27 28 29 30 1 2 3
December Wk Mo Tu We Th Fr Sa Su 48 27 28 29 30 1 2 3 49 4 5 6 7 8 9 10 50 11 12 13 14 15 16 17 51 18 19 20 21 22 23 24 52 25 26 27 28 29 30 31
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Also see : Week numbers for 2023 | Day numbers for 2023