If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
The process of updating your site doesn't take your site down. Your sitebuilder and your published site are on different servers. When you publish the updated site is sent to the online server and replaces the previous version.
You can keep making changes within the builder and without hitting the Publish button these won't be shown. It's possible to do changes over hours, days or weeks and when you wish to release the updates then simply hit the Publish button.
Auto-Scheduling the upgrade for a specific time is not a facility that is available.