(Giertrud) Central Standard Time? 6 hours then. The thing about Britain in December, you may or may not know, is the sheer gloom of a cloudy afternoon, i.e. most of them. It can be pretty well dark at 4 pm.
[Rosie] I took it that Giertrude was in fact undead, possibly a Zombie but one shouldn't discount the vampire option just because the fad has faded, and is now ravaging the living in your area.