In order to change aspWebCalendar to start weeks on a Monday instead of Sunday you only need to make a single modification to the code.  This feature was added in a release that didn't include any database structure updates so it wasn't added to the configuration section in the script but was added as a variable you just need to change manually in the code.

Around line 67 of the code in the calendar.asp file you should see the following code:

67 '******* Added in 4.5 release ************************************* 68 69 UsePageTemplate = "NO" 70 StartWeeksOnMonday = "NO" 71 ShowHelpInAdminOnly = "YES" 72 UsePrintButton = "YES" 73 DefaultColorScheme = "gray" 74 ImageFolder = "calendar/images/"

On line 70 there is a variable called "StartWeeksOnMonday"... just change that value to "YES" instead of "NO".

The same change must be done in the "calendar/date_picker.asp" file as well... open that file and look around line 26:

26 '----- Added for the 4.5a release ------------------------------------------------ 27 28 StartWeeksOnMonday = "NO"

On line 28 there is a variable called "StartWeeksOnMonday"... just change that value to "YES" instead of "NO".