October 9, 1940 was a

Wednesday

How to solve: October 9, 1940

1. 1
   Century anchor1900s→Wednesday (3)
   Practice →
2. 2
   Divide by 1240 ÷ 12→3
   Practice →
3. 3
   Remainder of 1240 % 12→4
   Practice →
4. 4
   Divide remainder by 44 ÷ 4→1
   Practice →
5. 5
   Year's doomsday(3 + 3 + 4 + 1) % 7→4 → Thursday
   Practice →
6. 6
   Month doomsdayOctober→10th
   Practice →
7. 7
   Distance9 − 10→-1
   Practice →
8. 8
   Final answer(4 + -1) % 7→3 → Wednesday