Watch the video below for instruction on how to set up your Life Calendar and cross check it in Online Scheduling. One of the many advantages of using 17hats Online Booking is the ability to cross check a variety of calendars to ensure you are not double booking yourself. By having your "Life Calendar" inside 17hats you can ensure that when dates and times are displayed through Online Scheduling you are avoiding the awkward conversation of, "Yes, I realize you JUST booked, but I am actually already booked for that day. Oops!"