2005 year born – age now in 2025?

How old am I in 2025 if I was born in 2005? Today's date is - 19 December 2025.

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

*Depends on before or after 19 December 2005 year he was born.

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

Other examples:

If 1948 year of birth - already 77 years or still 76 years.
If 1953 year of birth - already 72 years or still 71 years.
If 1983 year of birth - already 42 years or still 41 years.
If 2010 year of birth - already 15 years or still 14 years.

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