How do I convert date/time from one timezone to another?

Question

Is it possible to convert date/time from EST (America/New_York) into UTC, given string in format yyyy-MM-dd HH:mm:ss?

Example:

getUTCfromNY("2015-11-01 01:00:00", "NY");

should output:

GMT Time: 2015-11-01 06:00:00

Edit

Between the two results below, which one should you take?

getUTCfromNY("2015-11-01 01:00:00", "NY") GMT Time: 2015-11-01 06:00:00

getUTCfromNY("2015-11-01 01:00:00", "NY") GMT Time: 2015-11-01 05:00:00