I must say I really really love this quest and the adorable Blossom Fawn! The goals are easily achievable and there is no time limit which means the whole community get their fawns eventually at individual pace. I'm very happy to get another beautiful fawn as playmate for the other. I hope there are more of such quests in future which makes the game even more interesting and I really enjoyed this one very much!
On the plus side, there is no end-time for this event, so you can take your time in the mine and just do that particular goal when you happen to get a ruby. I'm not sure if the Blossom Fawn goal will remain active if you don't get through the event earlier rather than later, but then again, it may, and you might be able to obtain it later (though I have no evidence to support that particular optimistic claim).
Does anyone knows if the fawn disappear once the timer ends? Cause I really don't want a deco pet, never mind the fact I can't fit any more habitats. I'm waiting for my last candles but I'm holding off finishing until after the timer.
I have no idea if it disappears, but you can always keep the fawn in your cellar, along with its habitat, until you have enough space or until you want to trade out one pet for another. I keep 16 pets out on the farm in 8 habitats, but I have about another 16 (maybe more) in my cellar until I'm ready to bring them out again (either at the start of a new month or--in the case of seasonal pets--during the right season).
Let me elaborate further for anyone who isnt sure about the time factor for goals. Hopefully this will help to clear some cobwebs.
These goals are regular game goals so they are permanent. As long as you have reached the required level, these goals will remain in your Goal List permanently until you have completed them, except for Goal 5.
Players who are below level 23, you can work your way up at your own pace to get to level 23 for Goal 1.
Players who are below level 30, you wont get the next goal once you have completed Goal 4 so you can work your way up at your own pace to get to level 30 for Goal 5.
Players who are at level 30 or above, you have all goals available to you as you complete each one. You can pause in between these goals for as long as you like, except for Goal 5.