99 years old now in 2025 - what year born?

Today, 24 April 2025 if a person is 99 years old now, what year was he born? See below:

If 99 years old, year of birth is:
1925 or 1926*

*It depends on whether he was born before or after 1 January 1926.

If now 99 years and his year of birth 1925 if he was born after 24 April 1925 until 31 december 1925 inclusively, and his year of birth is 1926 if he was born from 1 January 1926 to 24 April 1926.

Other examples:

If now 12 years, year of birth 2012 or 2013
If now 15 years, year of birth 2009 or 2010
If now 19 years, year of birth 2005 or 2006
If now 47 years, year of birth 1977 or 1978

HTML code:

BB code: