The active day determines which area in the UI is current and highlighted. As the user navigates from one date to another in the UI, this ActiveDayUtc property is updated to reflect the new date that has become active.
Users can change the active day by clicking on a different day or by clicking on a navigation button to move to the next day, week or month.
An active date always has a UTC (Universal Coordinated Time) component, because the day seen as active by users from different timezones may differ.
UTC times do not take into account any "daylight savings" adjustment. If users are currently using "daylight savings" time, then the application must compensate for the one hour difference when setting the TimeZoneOffset property.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, 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