Daylight Saving Time

Twilight Sparkle is called to spring forward into action to save the world from eternal darkness, under the threat of Celestia succumbing to a strange, mortal illness.

When a strange, sudden illness afflicts Celestia, threatening to plunge the world into eternal darkness, it's up to Twilight Sparkle to save the Princess and the world.

And failure won't happen on Twilight Sparkle's watch, because for her, it's daylight saving time.