This is useful because we would like to be able to show the week commencing date in the 3D view focus time. Currently we set the project focus time to the end of each week (Sunday) in order to capture all the activities happening, however this means we have to show the Sunday date on the 3D view focus time. Instead we would like to be able to show the week commencing date.

(E.G Setting todays date as the project focus time (17.12.2021) would show the week commencing date of 13.12.2021 in the 3D view (This is set under the indicator section of the 3D View Properties panel)).

The first day of the week is already defined in the Synchro general settings (In my case it is a Monday).

I've attached an image to help explain the idea.