3 years old now in 2025 - what year born?

Today, 19 March 2025 if a person is 3 years old now, what year was he born? See below:

If 3 years old, year of birth is:
2021 or 2022*

*It depends on whether he was born before or after 1 January 2022.

If now 3 years and his year of birth 2021 if he was born after 19 March 2021 until 31 december 2021 inclusively, and his year of birth is 2022 if he was born from 1 January 2022 to 19 March 2022.

Other examples:

If now 6 years, year of birth 2018 or 2019
If now 16 years, year of birth 2008 or 2009
If now 24 years, year of birth 2000 or 2001
If now 83 years, year of birth 1941 or 1942

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