1957 year born – age now in 2023?

How old am I in 2023 if I was born in 1957? Today's date is - 31 January 2023.

If year of birth - 1957, he is now:
65 years old or 66 years old*

*Depends on before or after 31 January 1957 year he was born.

If a person was born from January 1 1957 to 31 January 1957 inclusively, he is 66 years old now, otherwise, if after 31 January 1957 (until December 31 1957 inclusively), then he is still 65 years old now.

Other examples:

If 1931 year of birth - already 92 years or still 91 years.
If 1960 year of birth - already 63 years or still 62 years.
If 1987 year of birth - already 36 years or still 35 years.
If 2003 year of birth - already 20 years or still 19 years.

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