Pop-up calendar starts on the wrong day of the week
When editing a job activity's date, the pop-up calendar is now configured to show Tues Wed Thurs Friday Sat Sun Mon respectively. I'm not sure why it suddenly started doing this. The default seemed to be Mon Tues Wed Thurs Friday Sat Sun and is the view I would prefer.
You must have clicked on the column header for Tuesday. To change the first day back to Monday, click on the column header for Monday.