Happy 80th Birthday, William Shatner!

gregg writes "Today another geek legend celebrates a birthday. Best known for portraying Captain James T. Kirk, William Shatner has cemented himself into geek science fiction lore forever. Today he begins his ninth decade on this planet — yes, Captain Kirk is now 80 years old."

Re:Shatner's 9th decade?

[Attila Dimedici]

No, he was not "in his ninth decade", until the moment after he turned 80. You are "in your first year" the moment after you are born. That lasts until one year later, when you turn one year old. You are, also, "in your first decade" the moment after you are born. That lasts for ten years, until you turn 10 years old, at which point you enter your second decade.

Re:Shatner's 9th decade?

[Kjella]

When he was 1 second old he was in his first year and his first decade. Exactly 10 years later he was nine years old and in his second decade.

One year later he is one year and one second old.
Two years later he is two years and one second old.
Three years later he is three years and one second old.
Four years later he is four years and one second old.
Five years later he is five years and one second old.
Six years later he is six years and one second old.
Seven years later he is seven years and one second old.
Eight years later he is eight years and one second old.
Nine years later he is nine years and one second old.
Ten years later he is ten years and one second old.

How does it feel to flunk first grade math?