1977 year born – age now in 2023?

How old am I in 2023 if I was born in 1977? Today's date is - 1 February 2023.

If year of birth - 1977, he is now:
45 years old or 46 years old*

*Depends on before or after 1 February 1977 year he was born.

If a person was born from January 1 1977 to 1 February 1977 inclusively, he is 46 years old now, otherwise, if after 1 February 1977 (until December 31 1977 inclusively), then he is still 45 years old now.

Other examples:

If 1943 year of birth - already 80 years or still 79 years.
If 1956 year of birth - already 67 years or still 66 years.
If 1990 year of birth - already 33 years or still 32 years.
If 2005 year of birth - already 18 years or still 17 years.

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