If 6th March 2005 was a Monday, what day of the week was 6th March 2004?

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Accepted Answer

The year **2004 is a leap year**, which means it has **366 days**, resulting in **2 odd days** (since 366 ÷ 7 leaves a remainder of 2). But since we are not using February of 2024, we don't actually have that 1 odd day in February so effective odd days is **1**.

The day on **6th March 2005** is given as **Monday**. Since the year 2004 contributes **1 odd days**, the day on **6th March 2004** will be **1 days before Monday**, as we are moving backward in time.

Counting backward:  
- One day before Monday is **Sunday**.

Thus, the day on **6th March 2004 was Sunday**.

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