string displayName = "(GMT+06:00) Antarctica/Mawson Time";
string standardName = "Mawson Time"; 
TimeSpan offset = new TimeSpan(06, 00, 00);
TimeZoneInfo mawson = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName);
Console.WriteLine("The current time is {0} {1}", 
                  TimeZoneInfo.ConvertTime(DateTime.Now, TimeZoneInfo.Local, mawson),
                  mawson.StandardName);

// Define transition times to/from DST
TimeZoneInfo.TransitionTime startTransition, endTransition;
startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 4, 0, 0), 
                                                                  10, 2, DayOfWeek.Sunday); 
endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 3, 0, 0), 
                                                                3, 2, DayOfWeek.Sunday);
// Define adjustment rule
TimeSpan delta = new TimeSpan(1, 0, 0);
TimeZoneInfo.AdjustmentRule adjustment;
adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1999, 10, 1), DateTime.MaxValue.Date, delta, startTransition, endTransition);
// Create array for adjustment rules
TimeZoneInfo.AdjustmentRule[] adjustments = {adjustment};
// Define other custom time zone arguments
string displayName = "(GMT-04:00) Antarctica/Palmer Time";
string standardName = "Palmer Time";
string daylightName = "Palmer Daylight Time";
TimeSpan offset = new TimeSpan(-4, 0, 0);
TimeZoneInfo palmer = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName, daylightName, adjustments);
Console.WriteLine("The current time is {0} {1}",  
                  TimeZoneInfo.ConvertTime(DateTime.Now, TimeZoneInfo.Local, palmer), 
                  palmer.StandardName);

// Define transition times to/from DST
TimeZoneInfo.TransitionTime startTransition, endTransition;
startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 4, 0, 0),
                                                                  10, 2, DayOfWeek.Sunday); 
endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1,3, 0, 0), 
                                                                3, 2, DayOfWeek.Sunday);
// Define adjustment rule
TimeSpan delta = new TimeSpan(1, 0, 0);
TimeZoneInfo.AdjustmentRule adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(new DateTime(1999, 10, 1), 
                                      DateTime.MaxValue.Date, delta, startTransition, endTransition);
// Create array for adjustment rules
TimeZoneInfo.AdjustmentRule[] adjustments = {adjustment};
// Define other custom time zone arguments
string displayName = "(GMT-04:00) Antarctica/Palmer Time";
string standardName = "Palmer Standard Time";
string daylightName = "Palmer Daylight Time";
TimeSpan offset = new TimeSpan(-4, 0, 0);
// Create custom time zone without copying DST information
TimeZoneInfo palmer = TimeZoneInfo.CreateCustomTimeZone(standardName, offset, displayName, standardName, 
                                                  daylightName, adjustments, true);
// Indicate whether new time zone//s adjustment rules are present
Console.WriteLine("{0} {1}has {2} adjustment rules.", 
                  palmer.StandardName, 
                  ! (string.IsNullOrEmpty(palmer.DaylightName)) ?  "(" + palmer.DaylightName + ") ": "" , 
                  palmer.GetAdjustmentRules().Length);
// Indicate whether new time zone supports DST
Console.WriteLine("{0} supports DST: {1}", palmer.StandardName, palmer.SupportsDaylightSavingTime);