RT Scheduled Maintenance

Checking through the news channels, I discovered RT International is having some "scheduled maintenance" until 6am GMT. Decided to check the online stream for RT America, they're on scheduled maintenance as well, despite the fact they should be airing from Washington DC by now.

Anybody know why both channels should be off air?

The Spanish and Arabic services are also off. It's happened before, very strange practice for a 24 hour news channel to go completely off air for maintenance.

The last time I remember RT doing this they only had the one channel, not 4.