class Time
  # Get NYC time:
  def nyc
    self.in_time_zone('Eastern Time (US & Canada)')
  end
end

time_a = Time.now.utc.nyc
=> Sun, 21 Apr 2019 18:42:12 EDT -04:00

time_b = object.created_at.in_time_zone('Eastern Time (US & Canada)')
=> Sun, 21 Apr 2019 17:22:04 EDT -04:00
time_c = object.created_at.nyc
=> Sun, 21 Apr 2019 17:22:04 UTC +00:00