89 years old now in 2025 - what year born?

Today, 19 March 2025 if a person is 89 years old now, what year was he born? See below:

If 89 years old, year of birth is:
1935 or 1936*

*It depends on whether he was born before or after 1 January 1936.

If now 89 years and his year of birth 1935 if he was born after 19 March 1935 until 31 december 1935 inclusively, and his year of birth is 1936 if he was born from 1 January 1936 to 19 March 1936.

Other examples:

If now 4 years, year of birth 2020 or 2021
If now 14 years, year of birth 2010 or 2011
If now 21 years, year of birth 2003 or 2004
If now 65 years, year of birth 1959 or 1960

HTML code:

BB code: