Steps to Reproduce

run the example
drag mouse to create an event (e.g. 2:00~6:00)
A) drag end time to 6:30
B) drag end time to 7:00

Current Result

A) the end time snaps back to 6:00 and no onItemUpdate event is fired to the sever
B) the end time snaps back to 6:30, the onItemUpdate event contains has the endDate of 6:30

Expected Result

A) endDate updates to 6:30 + corresponding server event
B) endDate updates to 7:00 + same time in event to server

Debug Information

original issue reported in github: https://github.com/zkoss/zkcalendar/issues/4

Workaround