I would like to know whether \today gets time off of a time server or the system clock, and when. Does it get the time when compiling? Upon viewing the document created?
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Surely, it gets the system clock, since if it wants to get time of a time server, you have to be online all the time; but as you know, you can easily compile your code, even if you are offline and not connected to internet. Question #2: when you compile a document, the output will be created and you can see that, whenever you want. While seeing an output pdf, no change will be happened for that pdf file. |
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\todayshows. My guess is thatTeXuses local data. Then you could answer your own question. – Ethan Bolker Dec 24 '12 at 22:05tex.web. Even though it was last updated in February 2008 as Version 3.1415926, I doubt whether it was written or intended to extract content from an online source at every compilation. – Werner Dec 24 '12 at 22:45