gistfile1.rb

Facter.add(:noop) do
  confine :kernel => :linux

  result = false

  setcode do
    unless Facter.value(:environment).match(/^(test|dev|qa)$/)
      result = true unless Time.now.utc.hour.between?(1, 10)
    end

    result
  end
end

Note: this will work given that "environment" fact is set / present. Otherwise, there has to be a conditional guarding it from failure due to NilClass yielding as "environment".

instead of writing Time.now.utc.to_a[2] you can also use Time.now.utc.hour which is more readable

+1 :)

Edit: Amended as per Stefan's suggestion :)

Good stuff, guys!