I use the Wyzant calendar exclusively as I do all of my private teaching in wyzant. However the calendar could use an upgrade. It's a kluge when you have to scroll down to the evening hours. Said another way, when scrolling down to the evening hours, the day and date move up to the top such that you can no longer tell which column is the day of the week.
Most other calendars I use permit the user to scroll up and down while the day/date stay above that column as a banner.