First, note that the Date constructor which you've used has been deprecated. The API suggests a way to use a Calendar to do this, but personally I would usually use a DateFormat. Something like this:
However I suspect that the real problem here is in how your computer's time zone has been set. If you're on Windows, go to Control Panel -> Date/Time -> Time Zone, select "Eastern Time", and select "Automatically adjust clock for daylight savings". If that doesn't work, please describe what operating system you're using, and what the time zone is currently set to.
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