Wrong time

Some of you have mentioned that I'm staying up very late to work on this blog....No insomnia I assure you.  The problem is that this laptop carries the time signature of Eastern Time Zone, where it evidently thinks we are.  I don't know how to tell it we're now in the Mountain Time Zone, so it posts the wrong time on the blog.   I'm not really posting entries at 1 a.m., really....