Google Calendar 2 days 1 day event

I recently switched from MS Exchange to Google Apps and imported all of my data.  When I am looking at the calendar a one day event (Independence Day) starts at 5:00pm on July 3rd and ends at 5:00pm on July 4th.  Checking posts it was suggested to be a time zone problem but my time zones are correct on my PC and Google apps.  It does this for every event imported which as you can imagine is really frustrating.  
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Glen KnightCommented:
This was probably a mismatch between the timezones when you migrated the data.
There is little you can do other than editing the apointments manually.

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