Birthday Countdown

Find the next birthday automatically, including a choice for February 29 birthdays in common years.

How to use birthday countdown

  1. Enter the birthday and a reference date
  2. Choose the February 29 convention if needed
  3. See the next celebration and days remaining

Worked example

Birthday October 20; reference October 14, 2026

6 days until the next birthday

How the result is calculated

The next occurrence uses the birthday month and day in the reference year, advancing one year only if that date has passed. February 29 can use February 28 or March 1 in a common year.

Inputs stay in your browser. You can use this tool without joining the waitlist or creating an account.

From a calculation to a daily glance

Keep that milestone in view.

Create a named birthday countdown in the app, assign it to Countdown 1 or 2, and add that Lock Screen widget.

  1. 1Create or select your countdown in the app.
  2. 2Choose its widget assignment or a matching style.
  3. 3Add the corresponding Lock Screen widget.
Get early accessExplore widget designs

Web results do not automatically sync to the app. Setup is manual; calendar events appear through your enabled calendars.

Timer Countdown native iPhone preview
Countdown widget · example design from the app

Frequently asked questions

How does this birthday countdown work?
The next occurrence uses the birthday month and day in the reference year, advancing one year only if that date has passed. February 29 can use February 28 or March 1 in a common year.
How can I use the result with Monthly Calendar Widgets?
Create a named birthday countdown in the app, assign it to Countdown 1 or 2, and add that Lock Screen widget.
Do I need an account to use this tool?
No. The tool works in your browser without an account. Your inputs are not sent to our servers. Downloaded files stay on your device.

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