How do I hide the end date part of a Date field but not the time?
To control the display of the date field, you need to do a few things:


Add a date format that will match your requirements, for example, display time only from the date. To do that, go to Configuration > Regional and language > Date and time > tab Formats (/admin/config/regional/date-time/formats). Add a new format, for example, for time only, add g:i a
Add a date type (admin/config/regional/date-time) - for example, call it "Time only" and use that new format from #1 that was added (on the list of formats you should now see the time only value)
In your content type, under Display tab, change the date field to use that new date display "Time only". Optionally, if you want to change how the date is displayed in a View generated page, select that new date display in the date field display options.