Latest event from the Microsoft Solitaire Collection (June 4th, 2017) finished without posting the results and the current Event panel states "No upcoming Events. Check back later!" It's now roughly less than 10 hours from the next event.
Interestingly you can view your ranking for the event concluded on June 4th in the Event Calendar. You still aren't able to review the full results from the 4th.
Someone should look into this.
Thanks,
DiveDive3726