问题
I'm having an issue with timezones, DST and Node.js. It doesn't identify correctly DST effects. My OS is Windows 8.1 and have the timezone value and DST well set. I tried these two methods:
1) Node's Date Object
I typed the following code in Node Prompt and received the answer in italic:
new Date()
Tue Sep 09 2014 18:42:36 GMT-0200 (Horário brasileiro de verão(Brazilian Daylight Savings Time))
However, the brazilian DST starts just in Oct 19th, we are not in DST right now. Therefore, the hour is shifted 1 hour from now.
2) node-time
I got node-time package from npm, to be able to change Timezone. In the code:
time = require('time');
dateFormat = require('dateformat');
now = time.Date();
console.log(dateFormat(now.setTimezone('America/Sao_Paulo').getTime(), "yyyy-mm-dd HH:MM:ss Z"))
and as a result, I got
2014-09-09 18:42:36 GMT-0200
Brazilian normal timezone is GMT-0300. Hour is also 1 hour shifted.
Am I doing something wrong? Is there a workaround?
回答1:
The node-time package does not work on Windows. I couldn't even get it installed, so I'm not sure how you did. You should uninstall it.
If you need support for non-local time zones in Node (or in the browser), I recommend moment.js with the moment-timezone plugin.
Running new Date() on Windows with the time zone set for Brazil, I get the correct output.
The only thing that would explain your results is if the time zone registry settings were modified - but then you'd also see the wrong time in your system clock on your taskbar. So I'm sorry, but I cannot reproduce that part of it.
来源：https://stackoverflow.com/questions/25753537/daylight-savings-time-wrongly-identified-by-node-js