1971 year born – age now in 2023?

How old am I in 2023 if I was born in 1971? Today's date is - 1 February 2023.

If year of birth - 1971, he is now:
51 years old or 52 years old*

*Depends on before or after 1 February 1971 year he was born.

If a person was born from January 1 1971 to 1 February 1971 inclusively, he is 52 years old now, otherwise, if after 1 February 1971 (until December 31 1971 inclusively), then he is still 51 years old now.

Other examples:

If 1920 year of birth - already 103 years or still 102 years.
If 1952 year of birth - already 71 years or still 70 years.
If 1991 year of birth - already 32 years or still 31 years.
If 2001 year of birth - already 22 years or still 21 years.

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