DoomsdayDoomsday trainer
Name the weekday, then see the working. Start with the month dates, move up when they're automatic. Keys 0–6 answer (Sunday is 0), Enter gives the next date.
Your date
10 dates done. The Doomsday app takes it from here: a 48-lesson course, ten drills that each target one step, a rating and Game Center leaderboards.
How to use the trainer
Each level trains one part of the Doomsday method, in the order you need it.
- Month dates. The twelve dates that always share the year's doomsday. Get these instant first; everything rests on them.
- This year. Dates in the current year, with this year's doomsday given. This is steps 3 and 4, which is a real party trick on its own.
- Year doomsday. A year from 1900 to 2099: find its doomsday from the century anchor and the year offset. This is steps 1 and 2.
- Any date. All four steps together, 1900–2099. That covers almost every date anyone will ask you.
- Expert. 1600–2399, so you need all four century anchors.
Your best streak per level is kept in this browser only. Nothing is sent anywhere.