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.
Learn mental weekday calculation with text and video tutorials. Practice using Guided Solve mode for step-by-step training. Test skills with in- challenges. View calendar dates and calculate corresponding weekdays instantly.
Play as Eren in a post-apocalyptic world filled with mutants and challenges. Team up with allies, upgrade weapons, and unlock exclusive Heroes and Shelter Skins. Complete trials to earn collaboration rewards and customize character appearances.
Explore zombie-infested maps to eliminate threats and rescue survivors. Use weapons and resources to navigate dangerous areas. Complete missions to progress through levels and unlock new content.
Navigate through waves of zombies using dodging and shooting mechanics. Collect resources to upgrade weapons and equipment. Unlock new characters and abilities. Explore procedurally generated levels. Survive waves to progress through the story.
Build and manage a shelter to survive a apocalypse. Gather resources, defend against waves, and form alliances with other players. Upgrade skills and weapons to enhance survival chances. Participate in battles and manage base defenses.
Build and customize a roster of DC superheroes and villains. Engage in 3-on-3 touch-based combat. Collect cards, powers, and gear. Unlock new characters and abilities through progression. Participate in battles and tournaments.
Survive a apocalypse by shooting enemies and navigating a quarantined zone. Collect resources, upgrade weapons, and avoid hazards. Play through varied levels with increasing difficulty. Team up with others in a shared shelter to stay safe.
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Survive, fight, and conquer zombies
Survive in a zombie-infested world by completing missions and exploring environments. Collect resources, upgrade equipment, and fight enemies. Unlock story chapters to find family and progress through the apocalypse.
Summon heroes to defend against zombie attacks. Build and upgrade towers to block paths. Manage resources to train units and unlock new abilities. Engage in real-time battles and strategy-based combat.
Survive waves of enemies with dodging and special moves. Explore city areas with unique hazards. Unlock characters with upgradable abilities. Discover backstory through in-game questions and the mystery.