Updated: 2007 Daylight Saving Time (DST) Changes in the U.S. and Canada

Kim Kokernak and Mike Brown, October 2006 (updated January 2007)

The Energy Policy Act of 2005 mandates that US DST will start on the second Sunday in March and end on the first Sunday in November. In 2007, the start and stop dates will be March 11 and November 4, respectively. These dates are different from previous DST start and stop dates. In 2006, the dates were the first Sunday in April (April 2, 2006) and the last Sunday in October (October 29, 2006).

Below are Sun's actions to address this mandated U.S. government change. Details for other products will be available soon.

Solaris OS

• 6226357 Update zoneinfo timezones to tz2005o
• 6348147 POSIX timezones 2007 transition dates - U.S. Energy Policy Act of 2005

• No workaround available.

• Solaris 8, 9, 10 OS: SunAlert 102775 - Daylight Saving Time (DST) Changes for Australia (2006), United States (2007) and Others
• Solaris 2.5.1, 2.6, 7 OS: DST patches for these releases will be made available through T&M support. See this article for details.

Java SE Platform

• 6317178 (tz) Support tzdata2005m
• 6332148 (tz) Support tzdata2005n

See the following articles:

• U.S. Daylight Saving Time Changes in 2007
• US Daylight Savings Time Changes and the Java SE Platform:
• Overview and Mitigation of the USA2007DST Issue for the Java SE platform and Solaris OS
• JDK US DST Timezone Update Tool - 1.0
  • Download
  • Readme for Sun Java SE TZupdater Tool

Sun Fire Midrange Servers and Others

This applies to the Sun Fire 3800 Server, Sun Fire 4800 Server, Sun Fire 4810 Server, Sun Fire 6800 Server, Sun Fire E6900 Server, Sun Fire E2900 Server, Sun Fire V1280 Server, Sun Fire E4900 Server, and Netra 1280 Server.

• 6369788 Change POSIX timezones 2007 transition dates - U.S. Energy Policy Act of 2005
• 6391777 JDK 1.3 TZ fix required - Related to SUN BASE RFE 6332148
• 6399115 SC reboot message after 01-01-2007, for getting the new 2007 Time Zone (DST) rules

Sun Fire Firmware Update Patches

• SunAlert 102617 - Required Server Firmware for Timezone Changes Due to U.S. Energy Policy Act of 2005

C++ (Rogue Wave Tools.h++ Library)

This applies to Sun Studio 11, Sun Studio 10, Sun Studio 9, Sun Studio 8, and Forte Developer 6 update 2 Software.

• 6433174 RWTime incorrectly advances the current time by one hour after tz2005m timezone patch applied.

Sun Fire Firmware Update Patches

• SunAlert 102754 - Required C++ (Rogue Wave Tools.h++ library) Update Needed For 2007 Daylight Saving Time Changes

U.S. Energy Policy Act of 2005

Entire document can be found at: http://energy.senate.gov/public/_files/ConferenceReport0.pdf
Section 110 covers the Daylight Savings Time change.

For more information

• http://en.wikipedia.org/wiki/Energy_Policy_Act_of_2005

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