1913 year born – age now in 2023?

How old am I in 2023 if I was born in 1913? Today's date is - 29 May 2023.

If year of birth - 1913, he is now:
109 years old or 110 years old*

*Depends on before or after 29 May 1913 year he was born.

If a person was born from January 1 1913 to 29 May 1913 inclusively, he is 110 years old now, otherwise, if after 29 May 1913 (until December 31 1913 inclusively), then he is still 109 years old now.

Other examples:

If 1934 year of birth - already 89 years or still 88 years.
If 1952 year of birth - already 71 years or still 70 years.
If 1987 year of birth - already 36 years or still 35 years.
If 2019 year of birth - already 4 years or still 3 years.

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