78 years old now in 2023 - what year born?

Today, 22 March 2023 if a person is 78 years old now, what year was he born? See below:

If 78 years old, year of birth is:
1944 or 1945*

*It depends on whether he was born before or after 1 January 1945.

If now 78 years and his year of birth 1944 if he was born after 22 March 1944 until 31 december 1944 inclusively, and his year of birth is 1945 if he was born from 1 January 1945 to 22 March 1945.

Other examples:

If now 11 years, year of birth 2011 or 2012
If now 12 years, year of birth 2010 or 2011
If now 30 years, year of birth 1992 or 1993
If now 100 years, year of birth 1922 or 1923

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