What the day logo
What the Day
PracticePlayDaily
Copyright © 2026 Jesper Kiledal
All rights reserved
☕Buy me a coffee

May 12, 2025 was a
Monday

How to solve: May 12, 2025

  1. 1
    Century anchor2000s→Tuesday (2)
    Practice →
  2. 2
    Divide by 1225 ÷ 12→2
    Practice →
  3. 3
    Remainder of 1225 % 12→1
    Practice →
  4. 4
    Divide remainder by 41 ÷ 4→0
    Practice →
  5. 5
    Year's doomsday(2 + 2 + 1 + 0) % 7→5 → Friday
    Practice →
  6. 6
    Month doomsdayMay→9th
    Practice →
  7. 7
    Distance12 − 9→3
    Practice →
  8. 8
    Final answer(5 + 3) % 7→1 → Monday
Practice the Doomsday algorithm →