Option "Charging Mode" for events to charge per day or per night in a specified time period

For an event on the registration form we want to let participants choose several days within a specified time period.
What options do we have?

For some conference events or products, participants have to choose a specific date or time interval.
The start and end date of the specified time period can be set.

Please go to:
Overview => Settings => Manage Events and Items => Edit Event/Item
For the option "Charging Mode" you can choose between four options.

• A day for the event may be chosen
  Example: day tickets - participants have to select one specific day on which they wish to attend.
• Starting and ending day may be chosen, but flat fee
  Example: day tickets - participants have to select several consecutive days on which they wish to attend, but will be charged only one flat fee.
  
• Event will be charged per night (e.g. for hotels):
  Example: hotel accommodation - participants have to select a date both for arrival and departure.
• Event will be charged per diem (incl. first and last day)
  Example: day tickets - participants have to select several consecutive days on which they wish to attend and will be charged for the number of days selected.
  

Hint:
In some cases it can be more advisable to create separate events and use the field "Event Date" for each event to discern easily between specific days.
This will be the only viable solution if participants can choose days independently, e.g. the first and last day, and skip days in between.