2048 year born – age now in 2023?

He was not born yet in 2023. The year 2048 has not come yet! 2048 will come after 25 years.

Other examples:

If 1921 year of birth - already 102 years or still 101 years.
If 1962 year of birth - already 61 years or still 60 years.
If 1988 year of birth - already 35 years or still 34 years.
If 2009 year of birth - already 14 years or still 13 years.

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