Daylight Saving Time notice
Change for year 2007 and beyond
The Energy Policy Act of 2005 (Public Law 109-58) was passed by the United States Congress on July 29, 2005 and signed into law on August 8, 2005. This law changes the time-change dates for Daylight Saving Time in the United States. Starting in the spring of 2007, the U.S. Daylight Saving Time (DST) will be extended by four weeks, starting three weeks earlier on the second Sunday in March and ending one week later on the first Sunday in November.
For additional information on the impact of Daylight Saving Time, see: Daylight Saving Time Alert.
URGENT Actions Required
Changes to Daylight Saving Time will affect HMC.
The following table describes the required PTF you must apply on your HMC, so that the time changes correctly on the HMC, according to the new DST rules. Reference the HMC Support web site for more information on the HMC Version and associated PTFs.
| HMC Version | Package(s) that must be installed |
|---|---|
| HMC 6.1 | There is no need to install an additional package |
| HMC 5.2.1 | APAR MB01297 / PTF MH00688 |
| HMC 5.2 | APAR MB01365 / PTF MH00586 |
| HMC 5.1 | APAR MB00005 / PTF MH00593 (replaces MH00493) |
| HMC 4.5 | APAR MB01276 / PTF MH00494 |
| HMC 3.3.7 | APAR IY87070 / PTF U808917 |
| HMC 3.3.6 | APAR IY79212 / PTF U806370 |
Workaround for Canada
For customers in Canada that meet the following conditions:
POWER4
HMC level 3.3.6 with PTF U806370 applied, or
HMC level 3.3.7 with PTF U808917 applied
POWER5
Any HMC level that is not at V6R1.0 or V5R2.1 with PTF MH00688
Please use the corresponding US timezone to get the correct Daylight Savings Time rule applied. For example, customers in the Eastern Standard Time can use America/New_York as the timezone value.