iCloud Calendar
When viewing the Calendar, by default it shows the start time of your event on the calendar of the whole month. How can you make it also show the end time
iCloud-OTHER
If you mean in Outlook, the end time doesn't appear becuase there isn't enough room. If you maximize the window, then hide the sidebar by clicking the left-facing chevron it should expand enough to show the end times (see image below). Or, hover your mouse over the events to reveal the full details.