We now found a way to display the times of talks according to the time zone of the person viewing the program. We just enter the program in a normal calendar and use a wordpress plugin to display the calendar. ICS Calendar is a good plugin that can be configured to output a list of events with the associated time.

Another issue is how to start the conference. We decided to put a full invited talk first and schedule the other invited talks, which have prerecorded videos, for the other two days.