The problem is: if you have a timestamp of "2003-10-26 01:17:47 Local Time", you actually have incomplete information. Only if you can distinguish(*) between "Local Time (Summer)" and "Local Time (Winter)", you have a chance to getting the right results here.

Does your CSV source contain that info?

Otherwise it will become guesswork, e.g. you could assume that the transition between summer and "normal" time (as I like to call it) is marked by a record with a time stamp earlier than its predecessor.

(*) ... and can give this bit to the converting (sub)routine

In reply to Re^6: Converting local time to utc time by soonix
in thread Converting local time to utc time by ureco

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