1947 year born – age now in 2025?

How old am I in 2025 if I was born in 1947? Today's date is - 18 January 2025.

If year of birth - 1947, he is now:
77 years old or 78 years old*

*Depends on before or after 18 January 1947 year he was born.

If a person was born from January 1 1947 to 18 January 1947 inclusively, he is 78 years old now, otherwise, if after 18 January 1947 (until December 31 1947 inclusively), then he is still 77 years old now.

Other examples:

If 1918 year of birth - already 107 years or still 106 years.
If 1972 year of birth - already 53 years or still 52 years.
If 1993 year of birth - already 32 years or still 31 years.
If 2007 year of birth - already 18 years or still 17 years.

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