1980 year born – age now in 2023?

How old am I in 2023 if I was born in 1980? Today's date is - 30 November 2023.

If year of birth - 1980, he is now:
42 years old or 43 years old*

*Depends on before or after 30 November 1980 year he was born.

If a person was born from January 1 1980 to 30 November 1980 inclusively, he is 43 years old now, otherwise, if after 30 November 1980 (until December 31 1980 inclusively), then he is still 42 years old now.

Other examples:

If 1922 year of birth - already 101 years or still 100 years.
If 1974 year of birth - already 49 years or still 48 years.
If 1984 year of birth - already 39 years or still 38 years.
If 2018 year of birth - already 5 years or still 4 years.

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