How do I create a milestone birthday countdown?

Download the Outside app , create a countdown for your milestone birthday, set the date, and choose a festive photo. Add a widget to your home screen and watch the days tick down to the big celebration.

Can my party guests join the countdown?

Yes! Share the countdown on Outside with everyone invited. It builds collective excitement and the group chat is a fun way to coordinate party plans and surprise elements.

Never miss an important date

Milestone Birthday Countdown

281 days left.

Your Milestone Birthday is on Tuesday, December 15, 2026.

Get the free iPhone app with countdown widgets, reminder alerts, and easy sharing so you can plan ahead for any event.

Start Your Your Milestone Birthday Countdown

Free iPhone app with home screen widgets. Used by 300k+ people.

Festive birthday celebration with balloons and confetti

281

days

Your Milestone Birthday

Countdown details for Your Milestone Birthday

A big birthday deserves a big countdown! Track every day until the milestone.

Turning 18, 21, 30, 40, 50 or any other milestone is a moment worth celebrating in a big way. Outside helps you count down to the birthday that matters most with stunning widgets and reminders, building excitement for the party, gifts, and memories you'll never forget.

Days until Your Milestone Birthday Weeks until Your Milestone Birthday Months until Your Milestone Birthday When is Your Milestone Birthday?What day is Your Milestone Birthday?Get Countdown Widget

Home Screen Widgets

Beautiful countdown widgets that sit right on your home screen.

Lock Screen Widgets

See your countdown without even unlocking your phone.

Live Activities

Real-time countdown updates on your Dynamic Island.

Make it legendary

Choose a party-ready photo or a meaningful image to personalize your milestone countdown. Set reminders for party planning, guest list finalization, and cake ordering. Outside makes sure this birthday gets the build-up it deserves.