2011 year born – age now in 2023?

How old am I in 2023 if I was born in 2011? Today's date is - 22 March 2023.

If year of birth - 2011, he is now:
11 years old or 12 years old*

*Depends on before or after 22 March 2011 year he was born.

If a person was born from January 1 2011 to 22 March 2011 inclusively, he is 12 years old now, otherwise, if after 22 March 2011 (until December 31 2011 inclusively), then he is still 11 years old now.

Other examples:

If 1926 year of birth - already 97 years or still 96 years.
If 1973 year of birth - already 50 years or still 49 years.
If 1980 year of birth - already 43 years or still 42 years.
If 2015 year of birth - already 8 years or still 7 years.

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