What Happened 2025 Years Ago Today. These changes reduced the error from 1 day in 128 years, to 1 day in 3,030 years with. Under the gregorian calendar, century years not divisible by 400 would not be leap years.
Under the gregorian calendar, century years not divisible by 400 would not be leap years. Here are the biggest events from 20, 50 and 100 years ago.