How many days are left until my birthday?
The answer is the number of complete calendar days from today to the next occurrence of your birth month and day. If your birthday is today, the countdown is zero. The calculator uses the date and time zone set on your device, so the count changes at local midnight. It does not use your time of birth. The calculator also gives complete weeks plus remaining days, the weekday and date, and the age you will turn.
Birthday countdown worked example
On 27 August 2026, someone born on 10 March 2000 has 195 days until their next birthday. That is 27 complete weeks and 6 days. Their next birthday is Wednesday, 10 March 2027, when they turn 27.
How many weeks until my birthday?
Divide the days remaining by seven. Keep the whole number as complete weeks and the remainder as days: 16 days is 2 weeks and 2 days, 30 days is 4 weeks and 2 days, and 100 days is 14 weeks and 2 days. Enter your birth month and day in the calculator above to get both counts together; your birth year is optional.
The countdown always uses your next birthday. If this year's date has passed, it counts into next year automatically. It does not need a separate calculator for each calendar year.
Looking for a date between birthdays? Use the half birthday calculator to find the date six calendar months after your birthday. For a wedding or relationship date, the anniversary calculator shows the time together and the next anniversary.
How to calculate days until your birthday
Take the month and day of your birthday and find its next occurrence. If the date is still ahead this calendar year, count to that date. If it has already passed, use the same date next year. If today is your birthday, the answer is zero days.
For example, if today is 16 July and your birthday is 2 August, count forward to 2 August this year. If your birthday was 2 June, count to 2 June next year. Use real calendar dates so different month lengths and leap days are handled correctly.
Create a birthday countdown on iPhone
In LifeDates, add your date of birth to a profile. The Today screen shows the next birthday and how many days remain. Once the birthday passes, the countdown automatically rolls forward to the next year.
- Create your profile and enter the full date of birth.
- Open Today to see your next birthday in line.
- Turn on a reminder if you want an alert before the day.
- Add a Home Screen or Lock Screen widget with Premium for a glanceable countdown.
Count down to family and friends' birthdays
A personal countdown is fun. A list of upcoming birthdays is useful. Add family, friends and pets and LifeDates sorts the next dates so you can see who arrives first. Relationship labels and notes help you remember the context, while the age timeline shows how old each person will be.
For planning, choose a reminder before the countdown reaches zero. A week gives you time for gifts or bookings; a day is usually enough for a message or call.
Birthday countdown questions
How many weeks until my birthday?
Divide the whole-day countdown by seven for complete weeks, keeping the remainder as days. A 24-day countdown is three weeks and three days.
What happens for a 29 February birthday?
This calculator treats 28 February as the birthday in a non-leap year and clearly labels that convention in the result. Some organisations use 1 March instead. For legal or official purposes, follow the rule required by the relevant organisation or jurisdiction.
Can I share a birthday countdown?
LifeDates includes share cards for birthdays, exact ages and milestones, with additional styles in Premium.
Keep the next birthday in sight.
Download LifeDates free for automatic birthday countdowns, exact ages and reminders.
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