It will be at 12:00 UTC. This means 15:00pm in East Africa and also Cairo, Egypt, 14:00 in Nigeria and Johannesburg.
Google+ Hangout after the launch:
It will be from 13:00 to 14:00 UTC. This means 16:00 to 17:00 in East Africa, 15:00 to 16:00 in Nigeria and Johannesburg.
We are sure with this you will be able to identify the time for your region or country. If you are still struggling, click here; TheWorld Clock – Time Zones.
We cannot wait to connect with you.