Well what Rc is saying I agree to a point leave part of the Call center open the Tech Dept. the rest of the center can remain closed which I'm sure they'll do. I think a good share of the call centers out there not just Verizon will be open, if you call Cox cable and this could be at 3 o clock in the morning your going to get somebody weather it be for Tv, Internet, or home networking your going to get somebody,, before Verizon took over Alltel there call centers were manned around the clock they may of shut down early on Christmas I don't know I never needed anything done that day with our phones, but I can see why there is need for them to Stay open through and passed Christmas Day, because up to Christmas eve you can get a Device for your love one an the biggest thing you'll want is for that phone or other Device to Work when they open there Gift.
But I imagine Verizon will have something planned out for these employees that have to be there, something that i was thinking about when typing this out My Dad I don't how many time he missed Christmas for being on the Road he was a Truck Driver and a.. he missed a few of them but when Groceries have to get Delivered to the Stores you GO and get it done what ever the Cost and what ever the Road conditions are at the Time..
I have done it before in the past. I didn't think it was such a bad thing then and I don't think it is such a bad thing now.