2005 (MMV) was a common year starting on Saturday of the Gregorian calendar, the 2005th year of the Common Era (CE) and Anno Domini (AD) designations, the 5th year of the 3rd millennium and the 21st century, and the 6th year of the 2000s decade.

2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar, the 2004th year of the Common Era (CE) and Anno Domini (AD) designations, the 4th year of the 3rd millennium and the 21st century, and the 5th year of the 2000s decade.