How many days were there from 1st January 2000 to 31st December 2004?

From January 1, 2000, to December 31, 2004, there are a total of 1,825 days. This period includes five years: 2000, 2001, 2002, 2003, and 2004. The year 2000 is a leap year, contributing 366 days, while the other four years contribute 365 days each. Therefore, the total is 366 + 365 + 365 + 365 + 365 = 1,825 days.