2017 year born – age now in 2025?

How old am I in 2025 if I was born in 2017? Today's date is - 19 December 2025.

If year of birth - 2017, he is now:
7 years old or 8 years old*

*Depends on before or after 19 December 2017 year he was born.

If a person was born from January 1 2017 to 19 December 2017 inclusively, he is 8 years old now, otherwise, if after 19 December 2017 (until December 31 2017 inclusively), then he is still 7 years old now.

Other examples:

If 1936 year of birth - already 89 years or still 88 years.
If 1958 year of birth - already 67 years or still 66 years.
If 1984 year of birth - already 41 years or still 40 years.
If 2013 year of birth - already 12 years or still 11 years.

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