Actually, there doesn't seem to be any weekday matinee of White Christmas in Boston this week anyway.
FROM TELECHARGE SITE:
Dates & Times
November 23 - December 23, 2007
Tuesday & Wednesday @ 7:30pm, Thursday @ 2pm & 7:30pm, Friday @ 7:30pm, Saturday @ 2pm & 7:30pm, Sunday @ 1pm & 7pm
Dates & Times Exceptions
No Performance: Thursday -November 29 @ 2pm, Sunday - December 9 @ 7pm, Thursday - December 13 @ 2pm, Sunday - December 23 @ 7pm