gistfile1.rb

  def temporal_greeting(user, time_zone = ActiveSupport::TimeZone["Wellington"])
    hour = Time.now.in_time_zone(time_zone).hour
    
    case hour
      when 6..12
        "Good morning #{user.first_name}!"
      when 12..17
        "Afternoon, #{user.first_name}."
      when 17..12
        "Evening #{user.first_name}."
      when 0..6
       "Gosh #{user.first_name}, you're up late!" 
    end
  end