Timeline Tracker
How old was everyone in any year.
Your timeline
2026
Add an event below, or load a sample timeline to see how it works.
Events
Nothing on your timeline yet. Events you add show up here, grouped by year.
People and lanes
Give a person a birth date to see their age at every event.
Your data stays here
Saved only in this browser. Export a copy to keep it safe or move it to another device.
How this works
Each person, or anything else you want to follow, is a lane with its own colour. Add an event with a date; give it an end date too and it becomes a span, like school years or a home you lived in. Tap any event to change it or delete it.
Move the year slider at the top to see how old everyone was that year: the age each person turns on their birthday that year. Every event also shows the person's age on its date, worked out from the calendar days, so time zones and clock changes never shift it.
List shows events by year, oldest first. Timeline puts each lane on its own row; zoom in to months, and tap a lane's chip to hide or show it. Export JSON keeps everything and Import brings it back; a CSV opens in a spreadsheet and can be imported too, with Lane, Title, Date and Ends columns. Importing replaces what is here, with Undo.
Saved on this device only. Nothing is sent anywhere.