pixel_player12885279 I know it is frustrating when you cannot finish a story but there is ALWAYS a timer which tells you how much longer you have. Special event (Builder, Red Rings, Candyland...) run for exactly 7 days, Mini Stories (only one or two challenge mines) run for 2 weeks, Standard Stories run for 3 weeks. They all have a fixed start and end date which is communicated for a whole week through a pop up every time you open your game.
Re-released stories and shop stories run for 4 weeks from the moment you claim respectively buy them.
When playing on mobile you only have to click the map icon and you will see the timer, when playing on PC you need to click the story icon