```ruby
module EventsHelper

  def timeslots
    slots = Array.new
    @conference.max_timeslots.times do |i|
      slots << [format_time_slots(i), i]
    end
    slots
  end

  def start_times
    times = Array.new
    date = @conference.first_day
    while date <= @conference.last_day
      time = date.to_time
      time = time.since(7.hours)
      end_time = time.since(16.hours)
      while time <= end_time
        times << [time.strftime("%Y-%m-%d %H:%M"), time]
        time = time.since(@conference.timeslot_duration.minutes)
      end
      date = date.tomorrow
    end
    times
  end

  def format_time_slots(number_of_time_slots)
    duration_in_minutes = number_of_time_slots * @conference.timeslot_duration
    duration_to_time(duration_in_minutes)
  end

end
```

Fix editing of start time on event.
user
```ruby
module EventsHelper

  def timeslots
    slots = Array.new
    @conference.max_timeslots.times do |i|
      slots << [format_time_slots(i), i]
    end
    slots
  end

  def start_times
    times = Array.new
    date = @conference.first_day
    while date <= @conference.last_day
      time = date.to_time_in_current_zone
      time = time.since(7.hours)
      end_time = time.since(16.hours)
      while time <= end_time
        times << [time.strftime("%Y-%m-%d %H:%M"), time]
        time = time.since(@conference.timeslot_duration.minutes)
      end
      date = date.tomorrow
    end
    times
  end

  def format_time_slots(number_of_time_slots)
    duration_in_minutes = number_of_time_slots * @conference.timeslot_duration
    duration_to_time(duration_in_minutes)
  end

end
```
assistant