What Steps to be follow for daylight saving ends in USA as of 2007?

[Former Member]

Hi,

I gone through the OSS note 919538 and found that all required entries are place in the table TTZDV on all systems (Development, Quality & Production). We have ECC 5.0 & Oracle 10.2. On WINDOWS 2003 Server, I want to know that whether I need to update any patch or should I shut down all the system for particular time? Please suggest.

Regards,

Rajesh

[JPReyes · Accepted solution]

Hi Rajesh,

Read note 1022730

Also check this thread,

Regards

Juan

Please reward with points if helpful

[Former Member · Accepted solution]

Hi Juan,

Thanks for reply.

I have check the table TTZDV & found the following entries for the yoear 2007,

DSTRULE USA

YEARFROM 2007

MONTHFROM 03

WEEKDFROM 1

WEEKDCFROM 2

TIMEFROM 02:00:00

MONTHTO 11

WEEKDTO 1

WEEKDCTO 1

TIMETO 02:00:00

I need your help to know that whether I need to stop all the systems for an hour? and should I reset the time from OS level for each server?

Regards,

Rajesh

[Former Member · Accepted solution]

Rajesh,

SAP runs under the assumption that time is always moving forward. During time fall back this is disrupted, since a certain point in time i.e. 1 AM occurs twice. Once at DST and then again when the clocks are switched back one hour at 2 AM ( changeing to Standard time ). This is known as “double-hour” and can cause major errors in SAP like

ZDATE_LARGE_TIME_DIFF

ZDATE_ILLEGAL_LOCTIME

ZDATE_ILLEGAL_DBTIME

To prevent the errorsSAP must NOT RUN for 2 hours.

Means shutdown SAP at 1 AM (daylight savings time) and bring it back up at 2 AM (standard time). Check note 102088 for more details

Thanks

Prince Jose

[Former Member · Accepted solution]

Hi Prince,

Thanks for reply,

I want to confirm that just shutdown is a solution, is anything else required or not?

Please confirm

Regards,

Rajesh

[Former Member · Accepted solution]

From Basis side we need to shut down the system. From OS side , i am not that sure , but I think the OS is smart enough to change the time by itself .

Thanks

Prince Jose

[Former Member · Accepted solution]

Hi Jose,

The chnage of time at OS level is taken by patches released respective vendors. From SAP side we need to shutdonw the system during that time.

Regards,

Priyank.

[Former Member · Accepted solution]

Hi,

The problem is resolved, we applied the OS level patch & shut down the system during time fall.

Regards,

Rajesh