On 6th March, 2005 Monday falls. What was the day of the week on 6th March, 2004?

### Concept & Leap Day Crossing Rule When transitioning backwards in time, you must determine whether February 29th is actively crossed. If you move backwards and do NOT cross a leap day, you only subtract 1 day, even if the target year is technically a leap year. ### Step-by-Step Solution - We are traveling backwards from March 6, 2005, to March 6, 2004. - 2004 is a leap year, so it had a February 29th. - However, the period between March 6, 2004, and March 6, 2005, only covers 365 days because February 2004 already passed before March 6, 2004. - Since we are only crossing 365 days going backward, we subtract 1 odd day. - Given that March 6, 2005, was Monday. - Monday - 1 day = Sunday. ### Exam Strategy & Shortcut Always ask yourself: "Did I physically step on February 29th during this exact time frame?" Since the answer is no, treat the distance as a standard 365-day gap (1 odd day). ### Common Pitfall Blindly subtracting 2 days just because 2004 is a leap year, which would mistakenly yield Saturday instead of Sunday. ### Final Answer Therefore, the correct answer is **Sunday**.