Doomsday Trainer

Year-offset method
Drives drills and every worked solution

Custom year range
Applies when Range is set to Custom to

Sprint length
How long a sprint runs. Best scores are kept separately for each length.

Motion
Celebration effects when you get one right: confetti, stars, sparks, fireworks. Off stops every animation and transition on the page.

Theme

Sound effects
A short tone on each answer, right or wrong.

Stored data
History, statistics and achievements live in this browser only

0 – 6	Pick weekday (0 = Sunday) or offset
digits	Type a day-of-month answer, Enter to submit, Backspace to erase
Y / N	Answer a leap-year question
Enter	Next question (or submit a typed number)
[ / ]	Previous / next step
Alt + 0 – 7	Jump straight to a step (0 = Learn)
S	Skip this question
H	Show the worked solution (counts as a miss)
E	Show a fully worked example (never counts)
M	Cycle play mode
T	Statistics
?	This help
Esc	Close dialogs

How to play