And again it started about 6 am UTC. It happens more often but each time about the same time. It should probably be related to some regular program action, because otherwise why at the same time? Internet provider on the server side?
At least we can make no plans on the forum at exact time.

theymos did mention a month back that he is planning to do some upgrading for the next few months, these gateway time-out errors that is happening recently could be related to that, though I am completely sure if it is.
anyway, here is a quoted post from when he mentioned that upgrading he will do for the next few months.
I'm planning on upgrading the main servers sometime in the next few months. (Just as part of standard maintenance: there will be no user-visible changes other than perhaps slightly improved speed.) Maybe that'll fix it just by virtue of moving things to different areas.
(The few minutes of downtime just now was due to me doing something, and is unrelated.)