Do not mind the semi random maintenance times, even last night i just leveled, completed a map for three stars the first time and they started the maintenance before i got the rewards, do not care. But their lack of consistency is anoying me a bit now, i am pretty sure i checked the expiry date of the shop at it was 15th Dec, but as soon as even is over the shop no longer accepts the nectar/currency.

As opposed to the first Event i did, which was the Dipladenia one, the shop was selling stuff for a week after the event was over...
know I had 250-500 more ie one more purchase. Not crying/writing flaming email to Nutaku but just starting to be anoying. I started playing this game for the "artwork" but also i wanted a game that involved minimal playing time, not having to worry about a early closing of the shop because they can, early maintenance with like 10 mins warning, rushing every last attack to get maximum rewards etc etc.