How to access attributes/values of instances within an array

I have a form that shows me the business days for a two-week period (10 days). I want to loop over each day and check to see if each day lands on a holiday. If it does, I want to show a label on that row that displays the name and description of the holiday.

Currently my code works to show a holiday. However, it will only show 1 holiday in any two-week period. I believe this is because I have the .first method tacked onto my map and select blocks. But if I remove the .first I receive an error on my calendar helper tool tip because it can no longer access the holiday description attribute.

How can I change this code so that it loops through each day, checks to see if it's a holiday, and then accesses the instance of the holiday class so I can get to the value of the name and description attributes?

Right now I'm just trying to make this work on the _form, not worrying about the index page at this point.

Any help would be appreciated!

Contoller:

class TimesheetsController < ApplicationController

  def index
    @all_timesheets_for_user = current_user.timesheets
    @timesheets = current_user.timesheets.yearly_timesheets(@year).by_pay_period_ending_desc 
    current_user.log("Timesheets", "User's List", nil, current_admin, browser)
    @holiday_dates = Holiday.all
  end 

  def new
    @timesheet = Timesheet.new(user_id: current_user.id, pay_period_ending: params[:pay_period], timesheet_type: 'salary')
    @holiday_dates = Holiday.all
    @timesheet.build_days(@timesheet.timesheet_days.map{|d| d.day})
  end

  def edit
    @timesheet = Timesheet.find(params[:id])   
    @holiday_dates = Holiday.all 

    @timesheet.build_days(@timesheet.timesheet_days.map{|d| d.day})
    @timesheet.timesheet_days.sort_by!{|d| d.day}
  end
end

The holiday model includes the following attributes:

#  id          :integer          not null, primary key
#  start_date  :date
#  end_date    :date
#  name        :string(255)
#  description :text
#  all_day     :boolean
#  date_type   :string(255)
#  created_at  :datetime         not null
#  updated_at  :datetime         not null

This is the _form.html.haml that is causing the issue.

.table-responsive
  %table.table.table-condensed.table-striped.table-bordered.table-hover
    %tr
      %th Day
      %th Date
      %th Time Reporting Code
    = f.fields_for :timesheet_days do |d| 
      %tr
        %td
          = d.object.day.strftime("%A")
          = d.hidden_field :day
          .type= d.hidden_field :timesheet_type
        %td
          = d.object.day.strftime("%b %d, %Y")

        # -----HOW CAN I ACCESS THE INSTANCES OF THE HOLIDAY CLASS WITHOUT USING FIRST HERE?-----
          - if @holiday_dates.map{|h| (h[:start_date]..h[:end_date]).include?(d.object.day)}.first

            - holiday = @holiday_dates.select{|h| d.object.day >= h[:start_date] && d.object.day <= h[:end_date]}.first

            .message.label.label-xs.bold.render-tooltip.pointer{title: "#{date_tool_tip(holiday)}", id: "event-#{holiday.id}", class: "label-#{date_classes(holiday)} event-#{holiday.id}", data: {id: "#{holiday.id}"}, style: "z-index: 1000; word-wrap: break-word;"}= holiday.name
            :javascript
              $('.render-tooltip').tooltip();  

          - else
            # do other stuff