What year was I born if I'm 18?
2007 or 2008
Anyone who is 18 today, Friday, November 13, 2026, was born between Wednesday, November 14, 2007 and Thursday, November 13, 2008. The boundary falls in the middle of the year, so the answer spans two of them.
- Earliest birth date
- November 14, 2007
- Latest birth date
- November 13, 2008
- Birth years
- 2007 or 2008
- Age today
- 18
Which year, exactly
Someone born on Thursday, November 13, 2008 turns 18 today. Someone born a day later, on Friday, November 14, 2008, is still 17 until tomorrow. That is why “what year” has two answers rather than one, and why a birth date rather than a year is what settles it.
Read the other way round: to be exactly 18 today, a date of birth has to fall on or after Wednesday, November 14, 2007 and on or before Thursday, November 13, 2008.
That window contains 29 February 2008, so some people who are 18 today were born on a date that only comes round every four years — 18 years old with 4 birthdays behind them rather than 18. The next 29 February is when they have another.
The two candidate years
- Born in 2007from November 14, 2007
- Born in 2008up to November 13, 2008