Timezone information of remote file , daylight saving?

Files don't have time zones. What exactly are you trying to determine? The time zone in which a user created a file?

The time zone in which the server hosting the file resides? The time zone in which the client downloading the file resides? HTTP/1.1 (and I'm assuming you're only interested in HTTP) doesn't provide any representation of time that includes a time zone.

There are various web services that will guess at the physical location of a server based on an IP address, and some that will even return a time zone based on that guess, but it's hard to know if that's the kind of thing you're looking for.

Suppose I have a FILETIME which has some value (which we can see by converting it to systemtime) .. when I am in timezone1 . Suppose I changed my timezone to timezone2 ..now I want to get the time in hours and minutes(format) which was in timezone1. – Peter yesterday.

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