Birthday Calculator
How long until your birthday? Enter your date of birth to see the days left, the day of the week of your next birthdays, the day you were born, and fun milestones such as your 10,000th day.
Days until your next birthday
182 days
Check the highlighted fields to see your result.
- Next birthday
- Saturday, May 15, 2027
- Turning
- 37
- You were born on a
- Tuesday
- Zodiac sign
- Taurus
- Your 10,000th day
- September 30, 2017 (already passed)
- Your billionth second
- January 21, 2022 (already passed)
Your next birthdays
- 2027: turn 37 · Saturday, May 15, 2027
- 2028: turn 38 · Monday, May 15, 2028
- 2029: turn 39 · Tuesday, May 15, 2029
- 2030: turn 40 · Wednesday, May 15, 2030
- 2031: turn 41 · Thursday, May 15, 2031
Results are estimates for information only and do not constitute financial, medical, or legal advice.
How it works
The calculator compares today's date with the date of your birthday this year. If it already passed, it uses the birthday of next year. The difference is the number of days left. The day of the week comes from the calendar, and the milestones are counted in days from the day you were born. The zodiac sign uses the usual dates of the Western zodiac and is only for fun; the dates can change by a day from year to year.
The idea
Days left = date of your next birthday − today
Worked example
You were born on May 15, 1990, and today is November 14, 2026.
- Your birthday this year (May 15, 2026) has passed, so the next one is May 15, 2027.
- Days from November 14, 2026 to May 15, 2027: 182 days.
- May 15, 2027 is a Saturday, and you will turn 37. You were born on a Tuesday, under Taurus.
- Your 10,000th day was September 30, 2017.
Frequently asked questions
How many days are left until my birthday?
Enter your date of birth and the calculator counts the days from today to your next birthday, shows the date and the day of the week it falls on, and the age you will turn. If today is your birthday, it tells you so.
What day of the week was I born?
The calculator shows the weekday of your date of birth. It also shows the weekday of your next five birthdays, which is handy to plan a party.
When do I celebrate if I was born on February 29?
In leap years you celebrate on February 29. In other years the calculator uses February 28, although some places use March 1. Some people also count only the real leap-day birthdays, which come every four years.
What are the 10,000th day and the billionth second?
They are fun milestones of your life: the day you have lived 10,000 days (about 27 years and 4 months) and the day you reach 1,000,000,000 seconds (about 31 years and 8 months). The dates are counted in whole days from your date of birth.