http://www.perlmonks.org?node_id=1079534


in reply to Display Specific Time on Any PC.

Essentially, you need to find the time zone of a client computer; since this isn't embedded in the HTTP protocol, the only way Perl can obtain the data is essentially to ask the client. This means your solution is going to be JavaScript, not Perl.

See this solution on Stack overflow.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

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Re^2: Display Specific Time on Any PC.
by flexvault (Monsignor) on Mar 24, 2014 at 15:21 UTC

    Thanks kennethk,

    I may be over simplifying the solution to this problem, but the examples could be anywhere. Server in Japan, resource in Hawaii, PC in Rome. What I currently believe is the server in Japan must send the seconds from the epoch for the resource in Hawaii to the PC in milliseconds.

    Does that make sense?

    UPDATE: My assumption is wrong! I need to include the PC time in the algorithm.

    Regards...Ed

    "Well done is better than well said." - Benjamin Franklin

[reply]
      I'm having trouble following your spec. You have two ideas here:
      • A timestamp in epoch
      • A mapping to the local time
      Some kind of interrogation has to occur in order to reveal what any given machine believes the answer to any question is. It seems like it should be as simple as having your server parrot a timestamp from your resource in Hawaii to the PC in Rome, and then you could have Rome convert that in JavaScript for display. Alternatively, you could interrogate the PC in Rome for a time zone, and format on the server. I'm not tracking where the issue is for you in implementing this.

      #11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

[reply]

        Only 1 idea. Show exact time at resource on a PC that is in a different time zone from the resource.

        "Well done is better than well said." - Benjamin Franklin

[reply]

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