Yes. It’s Saturday at 5PM EST (GMT/UTC -5) or 6 PM EDT (GMT/UTC -4) during Daylight Saving Time and is one hour long.
Usually, you won’t even notice as any customer-impacting stuff usually lasts less than a minute. Still, we may occasionally need the full hour. If there is a potential for a “longish” maintenance, we will send out an email, announce on Twitter, as well as post on our Blog.