Setting time zone in "Administration" tab doesn't work for all time zones

[redhorseridge]

When I go into the "Administration" tab for FIOS digital voice, one of the options under "settings" is to pick my time zone. I can pick ANY timezone except eastern (which is what I need) and it will reset. For example, if I choose central, it will pop up a an alert window reminding me that changing the time will affect various items (such as scheduled call forwarding, selective scheduled call forwarding, do not disturb, etc).  I can pick all of the other time zones and it will do the same thing EXCEPT when I select "eastern."  It simply closes with no changes (no window pops up and no changes are made). 

Anyone else having this problem? Any ideas on how to set my time zone to eastern?