Lua error in package.lua at line 80: module 'Module:Ancient Olympiads' not found.The year 1 (I) was a common year starting on Saturday of the Julian calendar. The year started on a Monday in the Gregorian calendar. It was the first year of the 1st century and 1st millennium.
It is one of only seven years to use just one Roman numeral. The seven are 1 AD (I), 5 AD (V), 10 AD (X), 50 AD (L), 100 AD (C), 500 AD (D), and 1000 AD (M).