Typing “how long will I live” into a search bar is one of those searches almost everyone makes at least once, usually late at night, usually half out […]

Retirement age sounds like it should be a single, simple number, 65, maybe 67. In practice, your exact retirement date depends on your specific date of birth, your […]

Working out the age gap between two people sounds like it should be a one-step subtraction, just subtract one birth year from the other. In practice, getting an […]

If you’ve ever heard someone say they’re “two years older in Korean age” than their passport suggests, you’ve run into one of the more distinctive age-counting systems still […]

Sometimes you have the reverse problem: you know how old someone is, but not their exact date of birth or even their birth year. Maybe it’s a family […]

“Death clock” calculators promise something no legitimate statistical model can actually deliver: a specific date. Type in your birthday, answer a short quiz about your habits, and the […]