This article will walk you through how to find when your block timer expires.
Method #1 - Confirmation Email
In your confirmation email, there will be a button to Book Your Room. Clicking this button will take you to a reservation page with your team's room block and the expiration timer.
Method #2 - Team Dashboard
After logging into your team dashboard, scroll down to the Team Hotels section. Your block timer should be visible beside the hotel block you have made.