1 years old now in 2022 - what year born?


Today, 1 May 2022 if a person is 1 years old now, what year was he born? See below:


If 1 years old, year of birth is:
2020 or 2021*
*It depends on whether he was born before or after 1 January 2021.


If now 1 years and his year of birth 2020 if he was born after 1 May 2020 until 31 december 2020 inclusively, and his year of birth is 2021 if he was born from 1 January 2021 to 1 May 2021.


Other examples:

If now 6 years, year of birth 2015 or 2016
If now 17 years, year of birth 2004 or 2005
If now 27 years, year of birth 1994 or 1995
If now 57 years, year of birth 1964 or 1965

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