Due to the planned turning off of electric power at the location of the chat server - it will be unavailable from 11.04.2017 08:30 GMT till the time i'll be able to power it back up:
so up to 11.04.2017 19:00 GMT.
No worries - it will work after that.
(I am duplicating the thread from the help/support area in case it will not be approved in time).
PS.Also - as the notice times are usually just "recommendations"... You guess the rest.