Take any action (raiding, sacrificing, exploring, etc) at the start of a season; after the action the season should be the same. Save the result and go to the sacred season, either by advancing time or by loading another save. Advance to the screen for allocating clan magic to war, trade, etc. From this screen, load the original save. Take another action and save; if done correctly, the season will not advance. This glitch can be done repeatedly for infinite actions in any season. The game sometimes crashes if the glitch is used repeatedly without closing and re-opening the game, but this does not seem to affect the game or any save.