Simple, just tear a sheet off the old calendar. One month gone in seconds.
I can think of about 3-4 old games that I could drag out which would make a month vanish, but I haven't done that recently because they make the 8 hours I spend at work seem like forever until I can fire up the PC again. One of those old games is Warband, which still has mods I can sink hours into for a week or two before it all starts to get too familiar again. Bannerlord will most likely just be one more game to add to the list.