2009 year born – age now in 2025?

How old am I in 2025 if I was born in 2009? Today's date is - 19 March 2025.

If year of birth - 2009, he is now:
15 years old or 16 years old*

*Depends on before or after 19 March 2009 year he was born.

If a person was born from January 1 2009 to 19 March 2009 inclusively, he is 16 years old now, otherwise, if after 19 March 2009 (until December 31 2009 inclusively), then he is still 15 years old now.

Other examples:

If 1942 year of birth - already 83 years or still 82 years.
If 1963 year of birth - already 62 years or still 61 years.
If 1977 year of birth - already 48 years or still 47 years.
If 1996 year of birth - already 29 years or still 28 years.

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