Hi @Ron_B and welcome to the community! To set the weekend view by default, simply click on the little settings icon in the top right corner of your calendar and click on “Select view for everyone”!
Note that this option is only available for projects though; so if you ran an advanced search for a specific tag and open the calendar for this search, you won’t have this option unfortunately.
If this is what you were looking for I’m happy to move your thread to the #productfeedback category to allow other community members to vote for this feature request!