1 years old now in 2024 - what year born?

Today, 12 September 2024 if a person is 1 years old now, what year was he born? See below:

If 1 years old, year of birth is:
2022 or 2023*

*It depends on whether he was born before or after 1 January 2023.

If now 1 years and his year of birth 2022 if he was born after 12 September 2022 until 31 december 2022 inclusively, and his year of birth is 2023 if he was born from 1 January 2023 to 12 September 2023.

Other examples:

If now 5 years, year of birth 2018 or 2019
If now 13 years, year of birth 2010 or 2011
If now 22 years, year of birth 2001 or 2002
If now 79 years, year of birth 1944 or 1945

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