2005 year born – age now in 2025?

How old am I in 2025 if I was born in 2005? Today's date is - 20 March 2025.

If year of birth - 2005, he is now:
19 years old or 20 years old*

*Depends on before or after 20 March 2005 year he was born.

If a person was born from January 1 2005 to 20 March 2005 inclusively, he is 20 years old now, otherwise, if after 20 March 2005 (until December 31 2005 inclusively), then he is still 19 years old now.

Other examples:

If 1909 year of birth - already 116 years or still 115 years.
If 1955 year of birth - already 70 years or still 69 years.
If 1976 year of birth - already 49 years or still 48 years.
If 2022 year of birth - already 3 years or still 2 years.

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