Leading dates are dates prior to the FirstDateOfGroup that are displayed within the group. For example, when viewing a gregorian calendar with the default first day of week as Sunday, a group displaying August 2008 would display items for July 28-31.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2