You mean from
displaying on the calendar or users just not having to enter one?
If just from displaying on the calendar, edit the default.html template file and comment out or remove any occurrences of the code that looks something like:
<% if ($EVENT->{'schedule'}->{'end_time'}) { %>-<%= SCHEDULE FIELD(end_time) %><% } %>
Dan O.
[This message has been edited by DanO (edited May 14, 2003).]