A key campaigner for the past extension of daylight saving in New Zealand doubts there would be support to expand it further.
A study published in the British Medical Journal focusing on Scotland found that half of people's waking hours after midday are spent in the dark.
United Future Party leader Peter Dunne supported a three-week extension to daylight saving in New Zealand, which was introduced in 2007.
Mr Dunne says that may be all the change needed because an outdoors lifestyle is already more common in this country.
A bill promoting a permanent adjustment to the clock is before the British Parliament.