Add 'anchor' date for Team calender confluence macro

The Confluence Team Calendar Macro lets you pick the calendars to display, the way to display the calendar (month, list, timeline), width and height but it does not let you specify which date window the calendar should display.

In its current form, the macro is great for displaying data about the current activities but does not work for planning activities around a future date - planning a product launch event in 3 months time - or recording what happened in the past - reviewing activities from the last product launch.

It seems that the macro calendar display is anchored on the current system date. It would be ideal if an optional parameter could be suppled that would anchor the calendar display to a specific date when the page is first displayed. If the parameter is not supplied, the macro would work in the same way it works today.