The European Parliament has backed a proposal to stop the obligatory one-hour clock change which extends daylight hours in summer EU-wide.
The proposal requires states to stop the twice-yearly clock change from 2021, and choose either permanent summer time or winter time.
Under an EU directive, all 28 states currently switch to summer time on the last Sunday of March and back to winter time on the last Sunday of October.
EU provisions regarding summer-time arrangements were first introduced in 1980 and were amended in order to progressively harmonise the date of the time switch within the single market.
The consultation and scientific studies suggest that the clock changes were having negative effects on people's health.
The EU Commission says studies suggest "the effect on the human biorhythm may be more severe than previously thought".