Loading...
Live countdown to your next birthday with zodiac sign and day-of-week info.
A birthday countdown is a real-time timer that calculates the exact days, hours, minutes, and seconds remaining until your next birthday.
| Age | Milestone | Note |
|---|---|---|
| 18 | Legal Adult (US) | Voting, contracts |
| 21 | Drinking Age (US) | Alcohol purchase |
| 30 | Dirty Thirty | Milestone birthday |
| 40 | Over the Hill | Classic milestone |
| 50 | Golden Birthday | Half century |
| 65 | Retirement Age | Medicare eligibility |
Formula
Days Until Birthday = Next Birthday Date − Today's DateNext Birthday Date = The next occurrence of your birth month and day
Today's Date = The current date and time in your local time zone
Worked Example
Born July 15, 1990 — checked on March 19, 2026
Did you know? According to the U.S. Census Bureau, the most common birthday in the United States is September 9th, while the least common (excluding Feb 29) is December 25th.
Sources
Calculate your exact age in years, months, and days. See days until your next birthday.
Live countdown to any future date with days, hours, minutes, and seconds display.
Find the exact difference between two dates in years, months, days, weeks, and business days.
Find the ordinal day number for any date with days remaining and year progress.
Calculate jet lag recovery time and get direction-specific tips for any international flight.
Check if any year is a leap year and find next/previous leap years instantly.