Issue: I am implementing this in salesforce for a calendar build
Event with time 11.30am -12.45pm shows as 11am-12pm.
Event with time 10.15am-11.45am shows as 10-11am.
And doesn't show overlap of the events as-well.
By default, the calendar component aligns the events with the grid cells and displays a duration bar to indicate the real duration.
In the Pro version, you can change this behavior as described here:
Thanks for your reply Dan and I found a workaround this problem, since we have very less time to go for pro version now.