This will act regularly (open at 9:20am and close at 9:40pm and stay closed until 4:15pm) however, the session is not happening until the next day meaning it is excluded from the count-down. Notice the disabled button and the tooltip that tells them to return tomorrow.

This session button will open at 7:50pm and close at 8:10pm and stay closed until it is over at 11:00pm. Notice the disabled button and tooltip on hover that tells when the session will open.

This will act regularly (open at 8:20pm and close at 8:40pm and stay closed until 10:15pm) however, the session is not happening until the next day meaning it is excluded from the count-down. Notice the disabled button and the tooltip that tells them to return tomorrow.

Test

This session button has been disabled so the session does not have any button state scenarios applied to it.

This session button will act regularly (open at 3:50pm and close at 4:10pm and stay closed until 7:00pm) the difference being it has an HTML Embedded calendar link.

This session button will always remain active meaning the session button states are not effected by time.

This session button will act regularly (open at 1:50pm and close at 2:10pm) and stay closed until 7:00pm. The difference is this session has a custom link.

This session button opened at 9:50 and closed at 10:10 and will stay closed until 7:00pm. Notice the disabled button and tooltip on hover letting the user know that the joining session period is closed.

test