Enter your date of birth to find exactly how many calendar days are left until your next birthday, the next birthday date and the age you will turn.
Enter your dates and select “Calculate birthday countdown” to see the result.
The calculator creates your next birthday anniversary from your birth month and day, then counts the calendar days from the selected starting date to that anniversary.
If this year’s birthday is today or still ahead, that date is used. If it has already passed, the calculator uses the birthday in the next calendar year.
Days until birthday = next birthday date − count-from dateThe age you will turn is calculated from the next birthday year minus your birth year.
Date of birth: 22 December 1997
Count from: 16 September 2026
The next birthday is 22 December 2026.
22 Dec 2026 − 16 Sep 2026 = 97 daysBirthday countdown = 97 days, and the person will turn 29.
For February 29 birthdays, this tool uses February 28 in non-leap years as a calculation convention.
Enter your birth date and the date to count from. The birthday countdown calculator finds your next birthday on or after that date and counts the calendar days remaining.
The countdown shows zero days and a birthday message. The result also shows the age you turn on that birthday.
In leap years, the birthday is February 29. In non-leap years, this tool uses February 28 for the countdown. This is a calculation convention, not a rule for legal age eligibility.
No. It counts calendar days without requiring your birth time or time zone. The default starting date is today according to your device.
Enter your date of birth and keep the “Count from” date set to today. The result shows the exact number of calendar days until your next birthday.
Yes. Change the “Count from” date to any valid date on or after your birth date. The calculator will find the next birthday relative to that date.