Status: Waiting for speaker to send prerecorded video Duration: 10 minutes Friendly URL: /2021/talks/gregorian Saturday, Nov 27 2021, ~11:55 AM - 12:05 PM EST Saturday, Nov 27 2021, ~ 8:55 AM - 9:05 AM PST Saturday, Nov 27 2021, ~ 4:55 PM - 5:05 PM UTC Saturday, Nov 27 2021, ~ 5:55 PM - 6:05 PM CET Sunday, Nov 28 2021, ~12:55 AM - 1:05 AM +08 # Description