Change Drupal Calendar Module

Change Drupal Calendar Module ([login to view URL]) conform this changes. need to change the calendar week view, to be more user friendly. Please check this screenshot, I am explaining the goal to reach on it: [login to view URL] The website has some dates for events, that are mainly during night. So, there are some events starting at 2AM for exemple. It doesn't make sense displaying these events in next day. For exemple, if the party starts on saturday night at 2AM, then it could me confusing for the user to display it on Sunday.. How can I adapt the week templates to start the day at 5AM (instead 00:00) and finish at 24:00 (instead 24:00) And about multi-day dates, how to display them next to the single day dates??