ok- for me, the event day on the calendar worked. -selected "Today"- then scrolled to Wed 20th - used military time (15:00 EST / 20:00UTC) - did an event using duration of 0 or blank
Both events on my PC show up on the correct date and time. How about others in a different Time zone?
one more thought- I will try and test if I have time (my boss is lurking...) I am wondering if the user has the wrong timezone in his/her user profile if that would effect canendar entries?