1. This term refers to the Timeline setting for a Hoop which determines when it is made available to complete by Participants.  The time options are in minutes, days, weeks and months and the timing is based on the date and time the Participant entered the Sprint.

For example:

You set a Hoop Open time to 1 minute.

Participant 1 joins on January 1st at noon - they gain access to the Hoop at 12:01pm on January 1st.

Participant 2 joins on January 3rd at 3pm - they would gain access at 3:01pm on January 3rd. 

2. This term can also refer to a Notification that can be sent automatically by the platform when a Hoop's Open time occurs.  This Notification can be turned off on the Sprint / Notifications page.