I'm using webmin on fedora. And set the time sync with a ntp pool (asia.pool.ntp.org) but in my timezone (Tehran) now daylight saving is active but it is not active in time synchronization.
I found a file in (/use/share/zoneinfo) in folder Asia that named Tehran, how can I change that to correct settings?

There is a graphical tool in Fedora that lets you define the timezone you live in. The effect of the tool is to change the file /etc/localtime to point to the appropriate file in /usr/share/zoneinfo. You can achieve the same thing by manually linking your timezone file into /etc like this:-The Tehran file should have been created with daylight savings in mind.

I know that Tehran file should have daylight saving in itself. But it hasn't this setting. How can I change it and put this setting in file?

As you've probably worked out, these files are binary files and have been created by compiling timezone data using specific software. To be frank, I don't know how to edit the source files or what the program is that creates the binary files for distribution.

Is DST new in Tehran or has it been used for a long time? If it is new then you can probably download an update to the zoneinfo data files. If it has been used for a long time, then perhaps you should lodge a bugzilla report to Fedora about the fact.

Which version of Fedora are you using?

Check this out: - http://www.cs.cmu.edu/~help/dst/sola...x_systems.html

And run -

Thanks a lot for your hints dear sir,

I update tzdata package and the problem solved.