Hello, I am sorry to tell you but this will definitely not get approved. The reason being:
The design is too basic and thus the use cases for such an item are very limited.
I haven’t seen your layer structure but looking at the template I would assume that the options for modification by the user are very limited.
Even with that being said there is no date for the event, location, short summary for participants lets say, etc, which are all basic things that should be there.
Spend a little more time working on your item and improving it and then try to submit.