1945 year born – age now in 2023?

How old am I in 2023 if I was born in 1945? Today's date is - 27 March 2023.

If year of birth - 1945, he is now:
77 years old or 78 years old*

*Depends on before or after 27 March 1945 year he was born.

If a person was born from January 1 1945 to 27 March 1945 inclusively, he is 78 years old now, otherwise, if after 27 March 1945 (until December 31 1945 inclusively), then he is still 77 years old now.

Other examples:

If 1911 year of birth - already 112 years or still 111 years.
If 1972 year of birth - already 51 years or still 50 years.
If 1994 year of birth - already 29 years or still 28 years.
If 2000 year of birth - already 23 years or still 22 years.

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