What Decade Is This Date?

Negative Years

"Negative" years, or years BC, are years before AD 1. (Because there is no year 0, negative or positive.) I don't have separate pages for BC years, but if you look at the same year AD, it'll be the same century number. E.g., 764 BC is 77th decade BC, as you can see because AD 764 the 77th decade AD.