1972 year born – age now in 2023?

How old am I in 2023 if I was born in 1972? Today's date is - 10 June 2023.

If year of birth - 1972, he is now:
50 years old or 51 years old*

*Depends on before or after 10 June 1972 year he was born.

If a person was born from January 1 1972 to 10 June 1972 inclusively, he is 51 year old now, otherwise, if after 10 June 1972 (until December 31 1972 inclusively), then he is still 50 years old now.

Other examples:

If 1905 year of birth - already 118 years or still 117 years.
If 1973 year of birth - already 50 years or still 49 years.
If 1987 year of birth - already 36 years or still 35 years.
If 2021 year of birth - already 2 years or still 1 years.

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