Lixia,
For those of us on the US east coast, it was midnight-6AM.
This is on top of the issues people have mentioned: your surroundings and surrounding people go by local time, making sleep hour adjustment (to remote meeting time) difficult, a big factor on its own.
(about a consistent message about 109 schedule from US participants: my guess is that 109's 9pm-3am pacific schedule affected US, especially pacific people most? I recall 108 was 4-9AM pacific, which was manageable)
Cheers,
Andy
