Convert a UTC timezone in postgresql to EST (local time)

Question

I am new to PostgreSQL and I was wondering if there is a direct way to just convert the timestamp values in a table to a different timezone using a function. In my case it i

Answer 1

Similarly execute

SELECT '2015-10-24 16:38:46'::timestamp AT time zone 'EST';

timezone
------------------------
 2015-10-24 21:38:46+00
(1 row)