Learn to calculate the day of the week for any between 1800 and 2200 using the Doomsday Algorithm. Track progress with personal times. Compare results with calculated values. Save custom mnemonics for special dates in the Doomsday List.
by Jubbly Pty Ltd★ 4.03 ratingsEducationFreeData updated 2026-09-16
Calculate time differences between dates or named moments with time zones. Set and compare dates using interactive wheels. Sync data across devices via iCloud. Track durations and time spans visually.
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