We really hope you'll link DayBack with your own files and let us know how that works--not only how the integration works but how the calendar compares with whatever you're using now: an older FileMaker Calendar, iCal, or something else.
You'll need FileMaker 13 or higher to play with DayBack and if you don't have a copy please download a 30 day trial of the latest FileMaker Pro.
Here are some articles to get you started...
Looking forward to your feedback. And thanks again for checking out DayBack.