Monday 19 October 2026
S43 Odd week
From Monday 19 October to Sunday 25 October 2026.
Switches to an even week in 7 days, on Monday 26 October.
Pick a day and the answer appears straight away.
The next 6 weeks
The 53 weeks of 2026
Each week runs Monday to Sunday, with its ISO number and parity.
January
- 29 Dec — 4 Jan S01 odd
- 5 Jan — 11 Jan S02 even
- 12 Jan — 18 Jan S03 odd
- 19 Jan — 25 Jan S04 even
- 26 Jan — 1 Feb S05 odd
February
- 2 Feb — 8 Feb S06 even
- 9 Feb — 15 Feb S07 odd
- 16 Feb — 22 Feb S08 even
- 23 Feb — 1 Mar S09 odd
March
- 2 Mar — 8 Mar S10 even
- 9 Mar — 15 Mar S11 odd
- 16 Mar — 22 Mar S12 even
- 23 Mar — 29 Mar S13 odd
April
- 30 Mar — 5 Apr S14 even
- 6 Apr — 12 Apr S15 odd
- 13 Apr — 19 Apr S16 even
- 20 Apr — 26 Apr S17 odd
- 27 Apr — 3 May S18 even
May
- 4 May — 10 May S19 odd
- 11 May — 17 May S20 even
- 18 May — 24 May S21 odd
- 25 May — 31 May S22 even
June
- 1 Jun — 7 Jun S23 odd
- 8 Jun — 14 Jun S24 even
- 15 Jun — 21 Jun S25 odd
- 22 Jun — 28 Jun S26 even
July
- 29 Jun — 5 Jul S27 odd
- 6 Jul — 12 Jul S28 even
- 13 Jul — 19 Jul S29 odd
- 20 Jul — 26 Jul S30 even
- 27 Jul — 2 Aug S31 odd
August
- 3 Aug — 9 Aug S32 even
- 10 Aug — 16 Aug S33 odd
- 17 Aug — 23 Aug S34 even
- 24 Aug — 30 Aug S35 odd
September
- 31 Aug — 6 Sep S36 even
- 7 Sep — 13 Sep S37 odd
- 14 Sep — 20 Sep S38 even
- 21 Sep — 27 Sep S39 odd
October
- 28 Sep — 4 Oct S40 even
- 5 Oct — 11 Oct S41 odd
- 12 Oct — 18 Oct S42 even
- 19 Oct — 25 Oct S43 odd
- 26 Oct — 1 Nov S44 even
November
- 2 Nov — 8 Nov S45 odd
- 9 Nov — 15 Nov S46 even
- 16 Nov — 22 Nov S47 odd
- 23 Nov — 29 Nov S48 even
December
- 30 Nov — 6 Dec S49 odd
- 7 Dec — 13 Dec S50 even
- 14 Dec — 20 Dec S51 odd
- 21 Dec — 27 Dec S52 even
- 28 Dec — 3 Jan S53 odd
Customise the labels
Replace “even” and “odd” with your own words — for instance the parents' first names for shared custody. The setting stays in this browser, nothing is sent.
Even or odd week
Free Android app
Your week and shared custody, always in your pocket
Even or odd week, where the children are today, the date of the next handover: the app answers offline, with the same rules as this website, right on your home screen.
- Your shared custody: first names, handover day, holiday sharing
- French school holidays (zones A, B and C) included
- Two widgets, a Quick Settings tile and reminders
- No account, no ads, no data collected
What you need to know
How do I know whether a week is even or odd?
Look at the week number within the year, as defined by the ISO 8601 standard. If that number is divisible by two the week is even, otherwise it is odd. The week always starts on a Monday and ends on a Sunday.
What is the first day of an even week?
Monday. Shared custody based on even weeks therefore starts on Monday morning and runs until Sunday evening, unless the court order sets another handover day.
How many weeks does 2026 have?
The year 2026 has 53 weeks. A year has 53 whenever 1 January falls on a Thursday, or on a Wednesday in a leap year.
What happens in a year with 53 weeks?
Week 53 is odd, and so is week 1 of the following year: two odd weeks run back to back. The parent who takes the odd weeks then has the children for two weeks in a row. Best agreed on in advance.
Does 31 December always belong to the last week of the year?
No. A week belongs to the year of its Thursday, so depending on the year 31 December ends up in week 1 of the following year. It is the most common source of error in custody schedules.
Do school holidays change the parity of the weeks?
No, week numbering carries on during the holidays. Many court orders do however set a different split for school breaks, so the dates for zones A, B and C still need checking.