2017 year born – age now in 2023?

How old am I in 2023 if I was born in 2017? Today's date is - 1 February 2023.

If year of birth - 2017, he is now:
5 years old or 6 years old*

*Depends on before or after 1 February 2017 year he was born.

If a person was born from January 1 2017 to 1 February 2017 inclusively, he is 6 years old now, otherwise, if after 1 February 2017 (until December 31 2017 inclusively), then he is still 5 years old now.

Other examples:

If 1930 year of birth - already 93 years or still 92 years.
If 1972 year of birth - already 51 years or still 50 years.
If 1983 year of birth - already 40 years or still 39 years.
If 2004 year of birth - already 19 years or still 18 years.

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