2046 year born – age now in 2023?

He was not born yet in 2023. The year 2046 has not come yet! 2046 will come after 23 years.

Other examples:

If 1900 year of birth - already 123 years or still 122 years.
If 1965 year of birth - already 58 years or still 57 years.
If 1982 year of birth - already 41 years or still 40 years.
If 1997 year of birth - already 26 years or still 25 years.

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