Hello,
We are rolling out page previews to enwiki next Tuesday~[1,2]. Since this is a multi-hour effort, I have cancelled the usual services deployment window, as we will be completing the final roll-out round at that time.
If there is something that you need to deploy Tuesday, please let me know and we will find a suitable time for it. I apologise for the late notice and inconvenience.
Cheers, Marko Obrovac, PhD Senior Services Engineer Wikimedia Foundation
[1] https://phabricator.wikimedia.org/T191101 [2] https://wikitech.wikimedia.org/wiki/Deployments#Tuesday,_April_17