How many weekends until they're 18?

By Durvesh Naik, maker of Everkid · 11 August 2026 · 7 min read

Somebody told me once that you get about 936 weekends with your kid before they turn 18, and I did not believe it until I did the arithmetic myself. Eighteen years, 52 weekends a year. That is the whole number. It is not a metaphor and it is not rounded up to sound dramatic. It is just how many Saturdays and Sundays are between the day they are born and the day they leave for whatever comes next.

So here is a days until 18 calculator that does the subtraction for your kid specifically. Type their birthday. It counts the weekends that are left. Everything happens in your browser, so the date you type never leaves this page and never reaches me.

Why weekends, and not days

You could count the days. A newborn has roughly 6,570 of them ahead before that eighteenth birthday, and that number is genuinely huge, which is exactly the problem. Huge numbers do not move anyone. Nobody has ever changed a Tuesday because they had 6,000 of them banked.

Weekends are different because a weekend is the unit you actually plan a childhood in. It is the pancake morning, the park, the long unhurried afternoon where nothing is scheduled and something real usually happens. A weekend is a thing you can picture. And when the count drops into the low hundreds, which it does the moment your kid hits school age, it stops being an abstraction and starts feeling like a countdown, because that is what it is.

The point of the calculator is not to make you feel behind. Most of us are already fluent in feeling behind. The point is smaller and, I think, kinder: it turns a vague dread that you are missing things into one honest number you can actually hold, and a number you can hold is a number you can do something about.

What 936 actually feels like

Split the 936 into the phases you already know and the shape of it lands differently. The first 260 or so weekends, birth to about age five, are the ones people photograph obsessively and remember almost none of. There are thousands of pictures and, if you are honest, a handful of real memories. I have written before about why we forget this year of our kid's life even while it is happening, and the short version is that your brain was never built to keep the ordinary days. It keeps the fire alarm and drops the bedtime.

Then school starts and the weekends change owners. Not all of them are yours anymore. Birthday parties you are driving to, practices, the slow creep of their own social calendar that has nothing to do with you. The raw count says 936, but the number that is really yours, the unclaimed pancake mornings, thins out earlier and faster than the arithmetic admits.

None of this is a reason to grip the weekends harder. It is a reason to keep even a thread of them. One sentence about what happened, one photo with the actual date and the actual thing they said attached to it. That is the whole ask.

The number that made me build an app

I did this exact calculation for my son at the kitchen table, and the weekends-left figure was low enough that I sat with it for a while. Then I opened my phone, which said I had over six thousand photos of him, and I tried to remember what he had said to me the previous Tuesday. I had nothing. Six thousand photos and a blank where the words should be.

That gap, between the pictures I hoard and the moments I lose, is the reason Everkid exists. I did not want another photo bucket. I wanted something that made me stop for sixty seconds on an ordinary evening and save the thing the camera does not catch. If you want the honest version of how I think about the tools that try to solve this, including the ones that are not mine, I put it in my rundown of the best baby journal apps.

What to do with the number you just got

Staring at a weekends-left figure and feeling briefly terrible is not the same as changing anything, so here is the small, unglamorous version of what actually helps.

• Pick a time, not a resolution. "I will be better about memories" dies by Thursday. "Right after dinner, one line" survives, because it is attached to a thing you already do. There is a reason the one line a day format outlives almost every fancier plan.
• Capture the words, not just the face. In ten years the photo will show you what they looked like. The note about the ridiculous thing they said at breakfast is the part that will undo you.
• Make it survive the tired night. The habits that hold are the ones that still happen when you are exhausted and the couch is warm. That usually means something has to nudge you rather than wait politely for you to remember. It is the whole reason Everkid rings a real alarm instead of sending one more notification you would swipe away.

How this calculator counts

In case you want to check my working, here is exactly what happens when you hit the button. It takes the birthday you typed, adds 18 years to land on the eighteenth birthday, and then counts every Saturday between today and that date. One Saturday stands in for one weekend, which is the honest way to do it without double counting a two day span. The "days old" figure is just today minus their birthday, and the rough 936 is the plain arithmetic of 18 years times 52 weekends, which is why I keep calling it approximate rather than exact. Leap years and the odd calendar quirk nudge the real total by a handful either way.

What the calculator does not do is round anything up to scare you or send your kid's birthday off to a server to be logged. It is a few lines of math running on your own phone or laptop. If you turn off your wifi and try it, it still works, which is the quickest proof that nothing about your child is going anywhere.

A note on the birthday you typed

The calculator runs entirely in your browser. The date stays on your device, nothing about it is sent anywhere, and I never see it. That is not a coincidence, it is how the whole product is built. In Everkid, your kid's name, birthday, photos, and notes live on your iPhone and are not uploaded to any server of mine. There are no accounts. Settings has an Export button that packs every photo and note into a single zip through the iOS share sheet, so you always keep your own copy. The only thing the app ever sends out is anonymous install, trial-start and subscription events, so I can tell which ads are worth running. No memory, no name, no birthday, ever.