Months Labelled Incorrectly

From the user view, when you go to the events page and specifically check the calendar view, each month is labelled with the month before it. For example, it is now December, so it automatically takes you to the month of December, but labels it as November. If you go to the top and try to go to March, it will show you all events in the month of March, but label it February, etc. I checked another site that I’m not affiliated with but which also uses word press, and it also has this problem, so I’m assuming it’s an issue on your end?

The page I need help with: [log in to see the link]