Australian clock change - query?

[Jagadesh_2]

Hi Admins,

HP had provided a patch for this and after installing the same it is updating the tztab file.

EST-10EDT
0 3 25-31 10 1971-1999 0 EDT-11
0 3 27 8 2000 0-6 EDT-11
0 3 25-31 10 2001-2038 0 EDT-11
0 1 27 2 1972 0-6 EST-10
0 1 1-7 3 1973-1985 0 EST-10
0 1 15-21 3 1986 0 EST-10
0 1 1-7 3 1987-1995 0 EST-10
0 2 25-31 3 1996-2005 0 EST-10
0 2 1-7 4 2006 0 EST-10
0 2 25-31 3 2007-2038 0 EST-10

The tztab file show that time change will happen on 2AM Australian time 4th April, sunday 2006.
0 2 1-7 4 2006 0 EST-10
Have a look at this site
http://www.timeanddate.com/worldclock/city.html?n=240
this shows clock change will happen on 3AM Australian time 4th April, sunday 2006.

Few more sites also mentioned that for AIX time zone variable needs to be changed to
EET-10EETDT,M10.5.0/02:00,M4.1.0/03:00
(ie: clcok change will happen on 3AM on April 2nd)

Bit confused with this. Could you please clarify at what time the Australian clock change will happen?

[Steven E. Protter]

Shalom

April 4 is not a Sunday.

April 2 is the first Sunday in April

That is the source of your confustion.

Most time changes happen on Sunday, as the AIX one indicates.

So looks like an error.

SEP

[Jagadesh_2]

Hi Steven. thanks for the response
The clock change is happening on 2nd April. But i am confused on the timings. At what time the clock change is happening?

[James R. Ferguson]

Hi Jaqadesh:

The HP-UX manpages for 'tztab(4)' describe how to interpret the table.

http://docs.hp.com/en/B2355-60127/tztab.4.html

On April 2, 2006 at 02:59:59 your clock will move to Sun Apr 02 02:00:00.

Regards!

...JRF...

[Jagadesh_2]

James, thanks for confirming the time.
According to this entry

0 2 1-7 4 2006 0 EST-10

1st value - 0 : at 0 min
2nd value - 2 : at 2 hrs
3rd value - 1-7 : day of the month(1st week)
4th value - 4 : April month
5th value - 2006 : year 2006
6th Value - 0 : ie: on sunday
7th value - EST-10:
The seventh field is a string that describes the time zone adjustment

Hence 2hrs means the clock should change at 2AM right?

[James R. Ferguson · Accepted solution]

Hi (again):

For the timezone EST-10EDT the clock moves from 02:59:59 to 02:00:00 on April 2, 2006.

Regards!

...JRF...