Calendar Drag & Drop

In response to several client requests we have introduced an enhancement to the calendar to make it faster to move appointments via drag and drop. We also noticed that even with the drag & drop if you need to move a lot of appointments in bulk then the ability to select bulk appointments and move them to a new date would also be useful.
Introducing Calendar Drag & Drop   Simply drag your appointments between days. Simple as that.   With the bulk appointment change, there are 3 steps after you select the day. This will ensure  all the appointments are visible at the bottom of the screen.  

1. Select the appointments you wish to reschedule
2.  Change the action drop down box to “Re-Schedule”
3. Enter the new date you want the appointments moved to & press  “Apply”

All the appointments will then be moved to the new day.  

Post Source : Here Calendar Drag & Drop