Is there a simple way to convert GMT timestamp to EST/EDT(any timezone) timestamp without using new additional Perl Libraries? Sample of my file(Time in GMT and I wanted to view the time in EDT or EST): 
 
20150619-17:30:43.616, 26
20150619-17:30:33.442, 23
20150619-17:30:40.376, 26
20150619-17:30:38.863, 26
20150619-17:30:56.936, 26
20150619-17:30:34.952, 24
20150619-17:30:45.889, 26
20150619-17:30:53.940, 23
20150619-17:30:51.154, 25
20150619-17:30:48.699, 26

In reply to Convert GMT timestamp to EST/EDT by gtk

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