The August 2014 cumulative time zone update for Windows operating systems has been released and is available as Microsoft KB 2981580. As noted, the update replaces the previous December 2013 CU (KB 2904266) and includes all the time zone and daylight saving time changes released as hotfixes after update KB 2904266 was released.

The following changes were made since the previous Windows cumulative time zone update:

  • Jordan Standard Time: For 2014 and onward, Jordan has changed its DST Start time from the last Thursday in March at midnight to the last Friday in March at 1 A.M., and its DST End time from the last Friday in October at 1 A.M to the last Friday in October at midnight. (http://support.microsoft.com/kb/2922717/
  • Fiji Standard Time: For 2014 only, Fiji has changed its DST End time from January 19 at 3 A.M. to January 19 at 2 A.M. (http://support.microsoft.com/kb/2922717/)    
  • Paraguay Standard Time: For 2014 and onward, Paraguay has changed its DST End date from the second Sunday in April to the fourth Sunday in March. (http://support.microsoft.com/kb/2935092/)    
  • Turkey Standard Time: For 2014 only, Turkey has changed its DST Start time from March 30 at 3 A.M. to March 31 at 3 A.M. (http://support.microsoft.com/kb/2935092/)
  • Pacific SA Standard Time: For 2014 only, the DST Start time is changed from the Last Saturday in April (April 26) at midnight to the Last Saturday in April (April 26) at 11 P.M., and the DST End time is changed from the first Saturday in September (Sept. 6) at midnight to First Sunday in September (Sept. 7) at 1 A.M. (http://support.microsoft.com/kb/2935092/)    
  • Egypt Standard Time: For 2014, Egypt has set its DST Start time at Thursday, May 15 at one minute before midnight, and its DST End time at Thursday, September 25 at one minute before midnight. (http://support.microsoft.com/kb/2981580/)    
  • Line Islands Standard Time: A new time zone for Kiritimati Island (UTC+14) is added. (http://support.microsoft.com/kb/2981580/)    
  • SA Pacific Standard Time: Starting on November 10, 2013, the display name is changed from "(UTC-05:00) Bogota, Lima, Quito" to "(UTC-05:00) Bogota, Lima, Quito, Rio Branco." (http://support.microsoft.com/kb/2922717/)