As with zoneinfo, a user of Microsoft Windows configures DST by specifying the name of a location, and the operating system then consults a table of rule sets that must be updated when DST rules change. Procedures for specifying the name and updating the table vary with release. Updates are not issued for older versions of Microsoft Windows. Windows Vista supports at most two start and end rules per time zone setting. In a Canadian location observing DST, a single Vista setting supports both 1987–2006 and post-2006 time stamps, but mishandles some older time stamps. Older Microsoft Windows systems usually store only a single start and end rule for each zone, so that the same Canadian setting reliably supports only post-2006 time stamps. COUNT 5
QSN1 Similar to systems using zoneinfo, Microsoft Windows calculates DST by doing what? ANS1 specifying the name of a location QSN2 When does the table of rule sets the Windows operating system uses have to be updated? ANS2 when DST rules change QSN3 If your computer runs Vista, what's the maximum number of start and end rules you can have for each time zone setting? ANS3 two QSN4 If located in Canada somewhere where DST is observed, a system running Vista might mishandle time stamps that are older than what year? ANS4 1987 QSN5 On a system running Windows older than Vista, locations in Canada observing DST would only reliably support time stamps from after what year? ANS5 2006