63 years old now in 2023 - what year born?

Today, 1 February 2023 if a person is 63 years old now, what year was he born? See below:

If 63 years old, year of birth is:
1959 or 1960*

*It depends on whether he was born before or after 1 January 1960.

If now 63 years and his year of birth 1959 if he was born after 1 February 1959 until 31 december 1959 inclusively, and his year of birth is 1960 if he was born from 1 January 1960 to 1 February 1960.

Other examples:

If now 12 years, year of birth 2010 or 2011
If now 14 years, year of birth 2008 or 2009
If now 18 years, year of birth 2004 or 2005
If now 99 years, year of birth 1923 or 1924

HTML code:

BB code: