```ruby
class Calendar
  class Division
    attr_reader :slug, :title
    alias :to_param :slug

    def initialize(slug, data = {})
      @slug = slug
      @title = data.delete("title") || slug.underscore.humanize
      @data = data
    end

    def years
      @years ||= @data.map { |year, events| Year.new(year, self, events) if year =~ /\A\d{4}\z/ }.compact
    end

    def year(name)
      yr = years.find {|y| y.to_s == name }
      raise CalendarNotFound unless yr
      yr
    end

    def events
      years.map(&:events).flatten(1)
    end

    def upcoming_event
      @upcoming_event ||= begin
        year = years.find {|y| y.upcoming_event }
        year.upcoming_event if year
      end
    end

    def upcoming_events_by_year
      self.years.each_with_object({}) do |year, results|
        results[year] = year.upcoming_events if year.upcoming_events.any?
      end
    end

    def past_events_by_year
      self.years.reverse.each_with_object({}) do |year, results|
        results[year] = year.past_events.reverse if year.past_events.any?
      end
    end

    def show_bunting?
      upcoming_event and upcoming_event.date == Date.today and upcoming_event.bunting == "true"
    end

    def as_json(options = {})
      {
        "division" => @slug,
        "events" => events,
      }
    end
  end
end
```

Use the ActiveSupport Date helper method today?
user
```ruby
class Calendar
  class Division
    attr_reader :slug, :title
    alias :to_param :slug

    def initialize(slug, data = {})
      @slug = slug
      @title = data.delete("title") || slug.underscore.humanize
      @data = data
    end

    def years
      @years ||= @data.map { |year, events| Year.new(year, self, events) if year =~ /\A\d{4}\z/ }.compact
    end

    def year(name)
      yr = years.find {|y| y.to_s == name }
      raise CalendarNotFound unless yr
      yr
    end

    def events
      years.map(&:events).flatten(1)
    end

    def upcoming_event
      @upcoming_event ||= begin
        year = years.find {|y| y.upcoming_event }
        year.upcoming_event if year
      end
    end

    def upcoming_events_by_year
      self.years.each_with_object({}) do |year, results|
        results[year] = year.upcoming_events if year.upcoming_events.any?
      end
    end

    def past_events_by_year
      self.years.reverse.each_with_object({}) do |year, results|
        results[year] = year.past_events.reverse if year.past_events.any?
      end
    end

    def show_bunting?
      upcoming_event and upcoming_event.date.today? and upcoming_event.bunting == "true"
    end

    def as_json(options = {})
      {
        "division" => @slug,
        "events" => events,
      }
    end
  end
end
```
assistant