Step by step
- To check a date right now, use the Days Calculator on this page in Safari (the To date starts on Christmas Day, or pick any date).
- To get a reminder on the day itself, add the event in the built-in Calendar or Reminders app.
- For a persistent Home Screen countdown widget, install a countdown app from the App Store.
- Touch and hold your Home Screen, tap Edit, then Add Widget, and select your countdown app.
At a glance
| Method | Best for | Limitation |
|---|---|---|
| Days Calculator (this page) | Instant one-time check in Safari | Does not stay on your Home Screen |
| Apple Calendar / Reminders | Alerts on the target date | No native "X days left" widget |
| Third-party widget app | Live Home Screen countdown | Requires installing an app |
Where to find it on your device
- iPhone Home Screen: Touch and hold Home Screen > Edit > Add Widget
Related questions
Does iPhone have a built-in countdown days widget?
No. The built-in Calendar and Reminders widgets show upcoming events and dates, not a dedicated day-by-day countdown number.
Can I use the Days Calculator on iPhone without an app?
Yes. The tool on this page runs directly in Safari or any iPhone browser with no sign-up or download.
How do I count down to a date in 90 days on iPhone?
Use the Add or subtract days section below the main calculator on this page, enter 90 days from today, and add that date to your iPhone Calendar.
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Open the full days calculator →
Updated November 14, 2026.