What was the first day of the year 1666?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer: Friday
Method: Odd Days Calculation
- 1600 Years = 0 odd days
- 65 Completed Years (1601 to 1665):
- Leap Years: 65 \ 4 = 16
- Ordinary Years: 65 - 16 = 49
- Odd days from Leap Years: 16 × 2 = 32
- Odd days from Ordinary Years: 49 × 1 = 49
Total odd days (1601–1665): 32 + 49 = 81 → 81 \7 = 4 days
1st January 1666:
Days in 1666: 1 → 1 odd day
Total Odd Days 4 + 1 = 5 Odd days
Day Code Reference| Odd Days | Day |
| 0 | Sunday |
| 1 | Monday |
| 2 | Tuesday |
| 3 | Wednesday |
| 4 | Thursday |
| 5 | Friday |
| 6 | Saturday |
Therefore answer is Friday.