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August 5, 1930 was a
Tuesday
How to solve:
August 5, 1930
1
Century anchor
1900s
→
Wednesday (3)
Practice →
2
Divide by 12
30 ÷ 12
→
2
Practice →
3
Remainder of 12
30 % 12
→
6
Practice →
4
Divide remainder by 4
6 ÷ 4
→
1
Practice →
5
Year's doomsday
(3 + 2 + 6 + 1) % 7
→
5 → Friday
Practice →
6
Month doomsday
August
→
8th
Practice →
7
Distance
5 − 8
→
-3
Practice →
8
Final answer
(5 + -3) % 7
→
2 → Tuesday
Practice the Doomsday algorithm →