August 13, 1961 was a

Sunday

How to solve: August 13, 1961

1. 1
   Century anchor1900s→Wednesday (3)
   Practice →
2. 2
   Divide by 1261 ÷ 12→5
   Practice →
3. 3
   Remainder of 1261 % 12→1
   Practice →
4. 4
   Divide remainder by 41 ÷ 4→0
   Practice →
5. 5
   Year's doomsday(3 + 5 + 1 + 0) % 7→2 → Tuesday
   Practice →
6. 6
   Month doomsdayAugust→8th
   Practice →
7. 7
   Distance13 − 8→5
   Practice →
8. 8
   Final answer(2 + 5) % 7→0 → Sunday