Download the app Do you have an arrangement around even and odd weeks? Then take a look at the end of 2026 now.
This year has 53 weeks. Week 53 is an odd week, and so is week 1 of 2027. That means two odd weeks in a row.
For many parents a short conversation sorts that out. But sometimes one extra week has more consequences than you would think.
So talk it through now, not in December.
Two odd weeks follow each other directly. Have you agreed that the children are with one parent in the even weeks and with the other in the odd weeks? Then applying that agreement to the letter can mean the children are with the same parent for two weeks in a row.
Or do you decide to let the usual week-on, week-off rhythm carry on? Then from that point the even and odd weeks swap over. Whoever had the even weeks has the odd weeks from then on.
Both are reasonable. And that is exactly where confusion can start, because you may each have pictured something different.
Want to know how custody schedules work in general first? We explain that on our page about care arrangements and custody schedules (in Dutch).
Week 53 falls inside the Christmas school holidays. And for the Christmas holidays many parents have a separate agreement that overrides the usual week schedule: Christmas and New Year in alternate years, or the holiday split into two halves.
Does that apply to you? Then this whole story probably does not come up, or only from week 1 onwards. So check that first, because it may save you a conversation.
If only it were that simple for everyone.
In many families it’s not a big problem. Parents see it coming, talk it through and find a solution together. Wonderful when that works.
But a care arrangement rarely stands on its own. Perhaps one parent works every other weekend. Perhaps shifts or days off are lined up with the weekends the children are there. Perhaps childcare is arranged. Or perhaps there is now a blended family, where both partners have children from an earlier relationship.
Then one shift can set off a domino effect.
Say you have your children on the even weekends. Your new partner has children too, and after a lot of arranging the weekends finally line up. The children are together, you can do things as a family.
Then week 53 arrives. Your ex lets the usual week-on, week-off rhythm carry on. Your partner’s ex sticks strictly to the agreement about even and odd weeks.
The result: the weekends of the two families no longer line up. Both of those parents chose something reasonable, and still, from January 2027, a schedule that worked for years is completely out of step.
From the outside the solution can look very simple. “Who cares if the children are with you a week longer? That’s just some nice extra time together.”
And happily, for many parents extra time with their children is no problem at all. Rather lovely. But that is often not what it is about.
It can be about a work rota. About childcare. About a holiday already booked. About arrangements with grandparents. About the planning of a new blended family. Or about a care arrangement that has finally, after a lot of effort, brought some calm and predictability.
And sometimes something else is going on. Communication between parents is not always easy. What feels like a simple practical change to one can be a reason for discussion for the other. Then it can cause tension either way: whether you stick to the arrangement or change it.
Which is exactly why it helps not to wait until the end of December.
Dig out your parenting plan, separation agreement or court order. Does it say “the children are with… every other weekend”, or does it say “the children stay with one parent in the even weeks and with the other parent in the odd weeks”?
That may look like the same thing. But in a year with 53 weeks a difference can appear between them.
Look at what you agreed about:
Is it unclear what your agreements mean for week 53? Then don’t wait until New Year to talk about it.
One family lets the even and odd week arrangement run on to the letter. Another holds on to the existing week-on, week-off rhythm. Other parents make a separate agreement for week 53, or divide the Christmas holidays in a way that means the problem barely arises in practice.
Which solution fits depends on your agreements and your situation. BeNice does not decide which solution is the right one for you. What we do think matters is that parents realise in good time that this unusual turn of the year is coming. Because a conversation in September, October or November is often a good deal easier than a discussion on 27 December.
Do you have an even/odd arrangement? Then put week 53 on the agenda now. Talk about things like:
Sometimes talking it through simply works. Sometimes it takes more effort. And sometimes you know from experience that an apparently small subject can quickly grow into a big discussion.
In that case, try not to wait until the time pressure builds. Talk about it early and, where needed, bring in a mediator, a family professional or another expert to look for a workable solution together. Not to decide who is ‘right’. But to stop a week number becoming a new conflict.
It is about everything around it. About work. About holidays. About new partners. About brothers, sisters, step-brothers and step-sisters. About arrangements people have built their lives around. And above all about children who can do nothing about a calendar year suddenly having 53 weeks.
A care arrangement should give clarity and calm. That is why our most important message is a simple one: take a look at the end of 2026 now. Do you see that week 53 makes your arrangement run differently from what you expected? Talk about it, put the agreement in writing, and try to find a solution together that your children notice as little of as possible.
With BeNice you put your custody schedule clearly in a shared calendar, add the school holidays in one go and keep the arrangements around the children in one place. And when the two of you need to discuss something, BeNice helps keep that conversation practical and friendly.
No longer together. Still parents together.
Yes. Under the usual ISO week numbering, 2026 has a week 53. It runs from Monday 28 December 2026 to Sunday 3 January 2027.
A year normally has 52 weeks plus one day. In a leap year (a year with a 29 February, one year in four) it has 52 weeks and two days. Those spare days add up, so every five or six years an extra week fits. There is a fixed rule for which years those are: a year has 53 weeks when it starts on a Thursday, or on a Wednesday if it is a leap year. And in 2026 the new year started on a Thursday.
The week numbering starts again at 1 every January. In most years that lines up: a year has 52 weeks — an even number — so it ends on an even week and the next one starts odd. The alternation carries on without a break. A year with 53 weeks has an odd number of weeks, so that one time it doesn’t. Week 53 is odd, and so is the week 1 that follows it.
That depends on exactly what was agreed. If an arrangement is tied literally to even and odd week numbers, the same parent can have two odd weeks in a row. If parents let the week-on, week-off rhythm carry on instead, the even and odd weeks can shift from January.
Not automatically. Look at what your parenting plan, separation agreement or court order says, and talk in good time about what week 53 means in your situation. Where things are unclear or you disagree, it can be wise to get professional advice.
After 2026, 2032 is the next calendar year with an ISO week 53. After that come 2037 and 2043.
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