Europeans and interested organizations have until mid-August to give their opinion on bi-annual time changes. The current switches in March and October may have health consequences.
While the overall health effects are inconclusive, human biorhythms may be more severely impacted than previously thought, the European Commission (EC) announced as it opened the issue of clock changes to the continent's citizenry.
The EC is assessing two main policy alternatives: keep the current summertime arrangement or discontinue the changes and ban periodic switches, leaving each state to choose between permanent summer, winter or a different time.
"The Commission is committed to gather European citizens', stakeholders' and Member States' views on possible changes to the current summertime arrangements," the EC declared on its website.
Respondents have until August 16 to reply.
The consultation comes after Finland asked for the March and October switches to be abandoned and Lithuania called for a review.
Most summertime arrangements date back decades in the EU's member states. The EU set out a directive to govern the matter in the 1980s and obliges member states to switch to summertime on the last Sunday of March. The switch to wintertime is on the last Sunday of October.
EU member states are stretched over three time zones:
Western European Time or Greenwich Mean Time (GMT), Central European Time, one hour ahead and Eastern European Time, two hours ahead of GMT.
The majority of member states fall into Central European Time: Austria, Belgium, Croatia, Czech Republic, Denmark, France, Germany, Hungary, Italy, Luxembourg, Malta, the Netherlands, Poland, Slovak Republic, Slovenia, Spain and Sweden.
Eight states are in Eastern European Time: Bulgaria, Cyprus, Estonia, Finland, Greece, Latvia, Lithuania and Romania.
Ireland, Portugal and the UK apply GMT.
If the directive is repealed, it would not automatically abolish summertime across the EU. It would just end EU-wide harmonization and allow individual states to decide the issue.