2001 year born – age now in 2023?

How old am I in 2023 if I was born in 2001? Today's date is - 30 November 2023.

If year of birth - 2001, he is now:
21 years old or 22 years old*

*Depends on before or after 30 November 2001 year he was born.

If a person was born from January 1 2001 to 30 November 2001 inclusively, he is 22 years old now, otherwise, if after 30 November 2001 (until December 31 2001 inclusively), then he is still 21 years old now.

Other examples:

If 1908 year of birth - already 115 years or still 114 years.
If 1971 year of birth - already 52 years or still 51 years.
If 1977 year of birth - already 46 years or still 45 years.
If 2014 year of birth - already 9 years or still 8 years.

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