“Subtract your birth year from the current year.

Source: https://www.citizen.co.za/news/news-world/south-koreans-get-younger/

The 2023 West Kooteny Avalanche spring hockey season (2010 birth year team) completed a perfect season recently, defeating the New Western Bruins Academy (Vancouver) in a shootout (2-1) in the West Kelowna Warriors Wine Country Classic Tournament.

Source: https://www.e-know.ca/regions/east-kootenay/locals-help-avalanche-spring-hockey-to-perfect-season/

The Wright family's headstone in the local cemetery had been altered three weeks prior to his death, rolling back his birth year by five years.

Source: https://wnbf.com/ixp/454/p/evil-in-otsego-county-the-mallet-murderer-part-two/

What's Carrie Bradshaw's age throughout She states that she’s 32 years old at the beginning of season 1, which takes place in 1998, so her birth year is put at about 1966.

Source: https://screenrant.com/sex-city-carrie-bradshaw-age-start-finish-movies/