Print the time for a given location

Question

Supposing I have

• a date (i.e. an UTC timestamp),
• a location (e.g. "Paris") that I may encode as I wish (and which isn't the one of the browser),
• no permanent internet access

then what can I do if I want to format my date for this specific location, correctly dealing with daylight saving time when/if it occurs ? I'd prefer a standard based solution. I expect the solution to either include a reliable table of some sorts or to call some browser/computer magic.

Of course, as the offset is dependent of the moment, I can't just store the location as an offset.

Here are 2 points which ease the problem :

• I won't deal with dates before 2010
• if some country decides to change the rules regarding its timezone, it's acceptable for me to release a new code/library

Answer 1

Have a look at moment.js which support localization in a pretty nice way as well as time zones.

For the location issue, I would say you will have a really hard time solving that without an Internet connection. I would say the only way to solve it is to have your users enter a country (and maybe time zone) manually.