“Was it this week or next week?”
It’s Wednesday evening. Your daughter asks if she can go to her friend’s birthday party on Saturday. You think she’s with her dad that weekend, but you’re not sure. You swapped a weekend last month, and then once more. You scroll through WhatsApp: a photo of a drawing, a question about the dentist, a thumbs-up, a long message about the summer holidays. The answer is in there somewhere.
For many co-parents, WhatsApp has become the calendar. That makes sense: everyone has it, it’s quick and it feels informal. But a chat is made for talking, not for planning. The more there is to arrange, the more you search, ask twice and clear up misunderstandings.
Why WhatsApp makes a poor calendar
- What matters sinks out of sight. A date agreed in March is buried under hundreds of other messages by June.
- A swap changes nothing you can see. “I’ll have them this weekend, you take next weekend” is in the chat, but not in the schedule. Two swaps later, nobody knows where things stand.
- Everyone keeps their own version. You put it in your phone calendar, the other parent on a paper calendar on the fridge. If one of them is wrong, you only find out on the day itself.
- Planning and feelings get mixed up. A practical question about Friday comes straight after a difficult message about something else. Then even a simple arrangement becomes loaded.
- Children ask you, not the chat. They just want to know where they’re sleeping and who’s picking them up. If you have to search, they notice.
What one shared overview does differently
A shared calendar turns things around: the conversation is no longer the source, the planning is. You both look at the same overview, and that overview is always up to date.
- The care schedule is the base. Whether you do week on, week off, 2-2-5-5 or every other weekend: the regular rhythm goes in once and keeps running.
- A swap is an exception, not a new schedule. You record that this one weekend is different. The regular rhythm stays underneath, so you simply carry on afterwards.
- Appointments are there for both of you. The dentist, the parents’ evening and swimming lessons are visible to both parents, even when they fall in the other parent’s week.
- Holidays are planned ahead. School holidays and celebrations go in well in advance, so there’s no discussion about July in June.
How to make the switch
1. Start with the regular schedule. Copy the schedule from your parenting plan, with the handover days and times. Not sure which rhythm suits your children’s age? Have a look at the most common co-parenting schedules.
2. Add the coming months. School holidays, celebrations, birthdays and regular clubs. Whatever is already known doesn’t need to be asked later.
3. Agree on what goes where. A simple rule helps: dates and times go in the calendar, agreements about how you do things go with your agreements, and conversations happen per topic. How to record agreements well is explained in the best way to keep track of agreements as co-parents.
4. A swap only counts once it’s in the calendar. Feel free to discuss a swap in a message, but put it in the calendar straight away. If it isn’t there, the regular schedule applies. That one rule prevents a lot of “but I thought…”.
5. Keep the chat for what’s urgent. A sick toddler or a delayed train: a quick message is fine for that. Everything else can wait until it’s in the calendar.
What if the other parent won’t join in?
Not every ex is immediately keen on a new app. Then start with yourself: put in the schedule and the upcoming appointments and share the overview. Convenience often convinces more than a conversation about it. Keep your messages short and business-like; our article on business-like communication between co-parents explains why that helps.
If tensions run high, a mediator can help you agree on how you communicate. Even then, shared planning is a good starting point: it takes the practical questions out of the conversation.
The shared calendar in Harmoneaz
Harmoneaz is built as a shared calendar and care schedule for co-parents, with everything else you arrange together around it.
- Calendar — each day shows in colour who the children are with. The regular care schedule is in it with the handover days marked; a swap or holiday is recorded as a temporary schedule.
- Calendar items — one-off or recurring, per child if you like, visible to both parents.
- School holidays — for groups in the Netherlands, you add the official school holidays per region in one go.
- Your own calendar app — follow the group’s calendar in Apple Calendar, Google Calendar or Outlook.
- Discussions per topic — school, health or holidays each have their own conversation. Sent messages cannot be edited or deleted.
- Children can follow along — children can view the care schedule, the calendar and the packing list for free.
Without a subscription, the other parent can view everything and reply in Discussions; adding or changing things yourself requires your own subscription.
Further reading (external sources)
- Rijksoverheid (Dutch government) — what a parenting plan contains
- Villa Pinedo — experiences and tips from children of separated parents (Dutch)

