What year was I born if I'm 17?
2008 or 2009
Anyone who is 17 today, Thursday, September 24, 2026, was born between Thursday, September 25, 2008 and Thursday, September 24, 2009. The boundary falls in the middle of the year, so the answer spans two of them.
- Earliest birth date
- September 25, 2008
- Latest birth date
- September 24, 2009
- Birth years
- 2008 or 2009
- Age today
- 17
Which year, exactly
Someone born on Thursday, September 24, 2009 turns 17 today. Someone born a day later, on Friday, September 25, 2009, is still 16 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 17 today, a date of birth has to fall on or after Thursday, September 25, 2008 and on or before Thursday, September 24, 2009.
There is no 29 February in that window, so everyone who is 17 today has had a birthday every year since they were born. Twenty-five of the hundred ages on this site do span a leap day; this is not one of them.
The two candidate years
- Born in 2008from September 25, 2008
- Born in 2009up to September 24, 2009