May 19, 2015 11:55 AM – 2:00 PM UTC the planned maintenance is scheduled (installing of a new software on a main server), monitoring will be unavailable during this time interval.

Top 20 Synthetic Monitoring Tools
Synthetic monitoring allows teams to monitor and measure website and web application performance around the clock from every conceivable vantage point, and to receive alerts before issues begin to impact real users. Here are our top picks for synthetic monitoring tools, leading with our own at Dotcom-Monitor.