Many ancient cultures extended daytime hours in summer. The Egyptian, Roman, and Mesopotamians, adjusted the schedules to the sun. They divided the time of light into 12 hours of equal duration during the summer. For example, Romans had different scales for different months of the year. Like ancient Rome, eighteenth-century Europe had no precise timetable. This changed as the rail and the networks made the standardization of time necessary.
Modern daylight saving time was first proposed by Benjamin Franklin and William Willett. It got used for the first time in 1916, during the World War I, to save coal. Germany, its allies, and their occupied zones were the first to use daylight saving time.
The UK and most of the other states at war and many neutral European countries followed. Russia and a few nations waited the next year. The entry of the United States into the war in 1917 provided the reasons to overcome the objections. From 1918 summertime got applied. The war ended, and the balance was again lowered.
Farmers continued to disagree with DST, and many countries revoked it after the war. The UK was an exception as it continued with summer time. For years it adjusted the transition dates for a variety of reasons. It includes special rules during the 1920s and 1930s to avoid time changes on Easter mornings. The United States was more conventional. Congress revoked it in 1919. President Woodrow Wilson vetoed the revocation twice, but his second veto got overturned. Only a few cities of the country conserved the summer time.
Daylight saving time has caused controversy since it was first implemented. Since then many proposals, adjustments and relocations have taken place. Despite the controversies, many countries have been using it ever since. The time details differ depending on the country and are sometimes modified.