Dates are off in timezones that use DST

[mattjohnsonpint]

Consider the following:

var ts1 = 1383451200000;
var dt = new timezoneJS.Date(ts1, 'America/New_York');
var ts2 = dt.getTime();

I would expect that ts2 would be equal to ts1 regardless of which timezone I provided, because they are supposed to be UTC. Instead, ts1 is 1383447600000

If I switch to a timezone that doesn't use DST, such as America/Phoenix or Asia/Kolkata then it works as expected.

Or am I wrong in thinking that the input or the output is supposed to be in UTC? The documentation isn't very clear about that. Thanks.

[divide0]

Your understanding is mostly correct. getTime/setTime works on milliseconds from the Unix epoch. Timezones shouldn't come into it until you try to print out a time in HH:mm:ss format.

There are bugs in timezone-js when you have dates near the DST transitions. It has trouble identifying the correct DST rule to use.

[io41]

I think this used to work though. See #78