2009 year born – age now in 2023?

How old am I in 2023 if I was born in 2009? Today's date is - 29 May 2023.

If year of birth - 2009, he is now:
13 years old or 14 years old*

*Depends on before or after 29 May 2009 year he was born.

If a person was born from January 1 2009 to 29 May 2009 inclusively, he is 14 years old now, otherwise, if after 29 May 2009 (until December 31 2009 inclusively), then he is still 13 years old now.

Other examples:

If 1914 year of birth - already 109 years or still 108 years.
If 1969 year of birth - already 54 years or still 53 years.
If 1993 year of birth - already 30 years or still 29 years.
If 2005 year of birth - already 18 years or still 17 years.

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