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October 31, 2028 is a
Tuesday
How to solve:
October 31, 2028
1
Century anchor
2000s
→
Tuesday (2)
Practice →
2
Divide by 12
28 ÷ 12
→
2
Practice →
3
Remainder of 12
28 % 12
→
4
Practice →
4
Divide remainder by 4
4 ÷ 4
→
1
Practice →
5
Year's doomsday
(2 + 2 + 4 + 1) % 7
→
2 → Tuesday
Practice →
6
Month doomsday
October
→
10th
Practice →
7
Distance
31 − 10
→
21
Practice →
8
Final answer
(2 + 21) % 7
→
2 → Tuesday
Practice the Doomsday algorithm →