Does anyone know if this is desired functionality (to work for multi-timezones)?

Is there a modification that can be made to webcalendar.js to change this behaviour?

Was thinking it would be modification of the following excerpt of code:

get_event_data: function(event) {
 ...
        if (event.allDay) {
            // Sometimes fullcalendar doesn't give any event.end.
            if (event_end === null || _.isUndefined(event_end)) {
                event_end = new Date(event.start);
            }
            if (this.all_day) {
                date_start_day = new Date(Date.UTC(event.start.getFullYear(),event.start.getMonth(),event.start.getDate()));
                date_stop_day = new Date(Date.UTC(event_end.getFullYear(),event_end.getMonth(),event_end.getDate()));                    
            }
            else {
                date_start_day = new Date(event.start.getFullYear(),event.start.getMonth(),event.start.getDate(),7);
                date_stop_day = new Date(event_end.getFullYear(),event_end.getMonth(),event_end.getDate(),19);
            }
            data[this.date_start] = time.datetime_to_str(date_start_day);
            if (this.date_stop) {
                data[this.date_stop] = time.datetime_to_str(date_stop_day);
            }
            diff_seconds = Math.round((date_stop_day.getTime() - date_start_day.getTime()) / 1000);
        }

I don't want to modify the base code but I don't want to strip time from my allday events either...

Any suggestions?