1933 year born – age now in 2023?

How old am I in 2023 if I was born in 1933? Today's date is - 22 March 2023.

If year of birth - 1933, he is now:
89 years old or 90 years old*

*Depends on before or after 22 March 1933 year he was born.

If a person was born from January 1 1933 to 22 March 1933 inclusively, he is 90 years old now, otherwise, if after 22 March 1933 (until December 31 1933 inclusively), then he is still 89 years old now.

Other examples:

If 1912 year of birth - already 111 years or still 110 years.
If 1958 year of birth - already 65 years or still 64 years.
If 1976 year of birth - already 47 years or still 46 years.
If 2014 year of birth - already 9 years or still 8 years.

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