FechasDate, age and calendar tools
Age and birthdays

Days until my birthday

Calculate how many days remain until your next birthday.

Local and private calculation
Select only the month and day; your birth year is not required.

How it works

Calculate how many days remain until your next birthday.

We normalize civil dates to avoid timezone and daylight-saving errors.

How the next birthday is calculated

Only the month and day are required. The tool finds the next occurrence of that date from today and calculates the exact number of days.

A birthday today returns zero. For February 29, non-leap years use February 28 as the reference date.

Tips for a useful result

  • Choose the month first so the maximum day updates automatically.
  • Do not enter your birth year; this tool does not need it.
  • Share only the result if you prefer not to reveal the complete date.

Example

Enter the values and get an instant result.

Frequently asked questions

Is the result exact?

Day and date calculations are exact. Values shown as months, hours or minutes may be approximate where appropriate.

Which parts of the result are exact?

Dates and calendar-day totals are exact. Conversions to months, weeks, hours or minutes may be approximate when there is no single calendar conversion.

Are my dates sent to the server?

No. The calculation runs in your browser, and entered values are not included in server requests or analytics events.

Can my timezone change the result?

The tool uses civil dates without a time and normalizes them internally, avoiding one-day shifts caused by timezones or daylight-saving changes.

Does it work on phones and computers?

Yes. The interface is responsive and uses features supported by modern desktop and mobile browsers.