whatday

Time & observances

Sleep calculator

Plan bedtime before a holiday morning using ~90 minute cycles.

:
  • 09:45 PM · 6 cycles
  • 11:15 PM · 5 cycles
  • 12:45 AM · 4 cycles
  • 02:15 AM · 3 cycles

≈90 min cycles + 15 min to fall asleep. Guidance only.