Zoid it's so Team Virginia can have all their players present. Remember, if this inconveniences your team more then you are obligated to stick with the original time and they would have to make do, especially if it meant changing times for you and your team meant one, two or all your players went missing. However it's understandable and I know Team Texas are obliging them and no one wants concessions, i'd rather play a team at full strength then one with guys missing.
EDIT: It's TEAM CANADA, not Team USA that Mike needs to speak to about changing the Sunday (Jan 8th) match. Mike if you're reading this, message i MofaT i. You can also find him on TYM where he is likely to contact you sooner.