For Folder Types with a date range of Weekly, you can change the day used as the start of the week. By default, the start of the week is set to Sunday. You may want to change this setting to accommodate locales where Monday is considered the start of the week.
Changing this setting does not affect existing folders. If OnBase already contains folders with weekly date ranges, then these folders are based on the start of the week that was configured when the folders were created.