You don't have to localize all of %ENV: 
local $ENV{TZ} = 'GMT';

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   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

In reply to (MeowChow) Re2: Determining Daylight Savings Time by MeowChow
in thread Determining Daylight Savings Time by Starky

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