45 years old now in 2025 - what year born?

Today, 22 April 2025 if a person is 45 years old now, what year was he born? See below:

If 45 years old, year of birth is:
1979 or 1980*

*It depends on whether he was born before or after 1 January 1980.

If now 45 years and his year of birth 1979 if he was born after 22 April 1979 until 31 december 1979 inclusively, and his year of birth is 1980 if he was born from 1 January 1980 to 22 April 1980.

Other examples:

If now 12 years, year of birth 2012 or 2013
If now 14 years, year of birth 2010 or 2011
If now 22 years, year of birth 2002 or 2003
If now 96 years, year of birth 1928 or 1929

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