Weekday Training Lab
Contains adsIn-app purchases
Everyone
info
1+
Downloads
About this game
Learn to calculate weekdays for dates from 1900 to 2099 with the Doomsday Algorithm.
Weekday Training Lab teaches the method in short chapters, then reinforces it with focused practice. Start with the 7-day cycle, century anchor days, year Doomsdays, monthly key dates, and leap-year adjustments. Each step builds toward solving a complete date on your own.
Practice at your pace with basic sessions, daily challenges, and time attack as you progress. Review missed dates and track XP, levels, badges, goals, recent sessions, and daily activity.
Core learning and practice are free. Pro is an optional one-time lifetime purchase with expanded practice ranges, advanced mistake analysis, and more detailed records. No subscription. No ads.
Weekday Training Lab is designed for focused, offline-first study. Your learning records and settings are stored on your device. There is no login, online leaderboard, or social feed.
Weekday Training Lab teaches the method in short chapters, then reinforces it with focused practice. Start with the 7-day cycle, century anchor days, year Doomsdays, monthly key dates, and leap-year adjustments. Each step builds toward solving a complete date on your own.
Practice at your pace with basic sessions, daily challenges, and time attack as you progress. Review missed dates and track XP, levels, badges, goals, recent sessions, and daily activity.
Core learning and practice are free. Pro is an optional one-time lifetime purchase with expanded practice ranges, advanced mistake analysis, and more detailed records. No subscription. No ads.
Weekday Training Lab is designed for focused, offline-first study. Your learning records and settings are stored on your device. There is no login, online leaderboard, or social feed.
Learn weekday calculation with the Doomsday Algorithm.
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What’s new
Improved ad placement, rewarded trials, and target-time course usability.
App support
About the developer
이승기
alanworks.contact@gmail.com
경수대로384번길 45
누리빌 502호
권선구, 수원시, 경기도 16571
South Korea