Editing Daylight saving time (section)

== Effects ==
The effect of daylight saving time on energy use depends on climate and patterns of electricity consumption. Reduced demand for evening lighting may be offset by increased use of heating or air conditioning. Studies conducted in different regions have therefore produced different results.

Later evening daylight can provide more time for outdoor recreation after ordinary working or school hours. It may also affect commercial activity by changing when people travel or spend time outside their homes.

The transitions between standard time and daylight saving time can temporarily disrupt sleep. They may also complicate transport schedules and electronic timekeeping. Systems that record local time must distinguish between the skipped interval during the forward transition and the repeated interval when clocks are moved back.