NOTE: The RiCal library provides a really good implementation of rrule (RecurrenceRules):

# Recurs Is a small Recurring Event parsing library. It will take symbolized input and output icalendar standard recurring events, see the specs for examples of the api

This gem has been tested as a standalone in ruby 1.9, or using Rails 3

It also allows the developer to specifiy specialized Recurrence schemes by using Ruby closures

## Rails (ActiveRecord)

class Event < AR


Finish the instance functionality