UPDATED November 2021 Calendar - Empires and Puzzles Quests and Events
July calendar (Forum link in comments for other formats) : r/EmpiresAndPuzzles
Fire Emblem Heroes event calendars - Fire Emblem Wiki
2020 MAY Calendar (Events, Trials, Rare Quests, Atlantis & Valhalla) Tentative - Player Guides - Empires & Puzzles Community Forum
May 2021 calendar : r/EmpiresAndPuzzles
E&P Mag 7: Calendar, Top Defense Heroes, & Quiz! (April) • OLD CYNIC
Updated June 2020 Calendar : r/EmpiresAndPuzzles
August 2021 Event Calendar for Empires & Puzzles
December 2021 Calendar : r/EmpiresAndPuzzles
March 2021 Calendar : r/EmpiresAndPuzzles
2020 MARCH Calendar (Events, Trials, Rare Quests, Atlantis & Valhalla) Tentative - Player Guides - Empires & Puzzles Community Forum
April 2021 calendar : r/EmpiresAndPuzzles
2021 April Calendar (Events, Trials, Rare Quests, Ninja Tower, Masquerade, Atlantis, Valhalla, S4: Voyagers Of The Underwild, and Mythic Titans) Tentative - Player Guides - Empires & Puzzles Community Forum
Challenge Events Schedule In Empires & Puzzles - AllClash Mobile Gaming