daylight saving time
Seasonal hour shift
Daylight saving time is the practice of setting clocks forward one hour during warmer months so that evening daylight lasts longer.
Most of North America and Europe observe it, though the specific dates vary.
The rationale—saving energy by reducing the need for artificial light—is now questioned.
Critics note disrupted sleep and the nuisance of adjusting clocks twice yearly.
Also called daylight savings time, summer time (British).
Advance clocks one hour
- fall backWithdraw from advance
- adjustmentAlteration to improve fit
- synchronizeAlign timing precisely
- resetRestore to original state
hour hand · wall clock · alarm clock · digital clock · analog clock · timepiece · wristwatch · grandfather clock
Year's third month
- NovemberEleventh month
- equinoxSun crosses celestial midline
- solsticeDay of maximum tilt
- springRecoiling metal spiral
autumn · fall · biannual · seasonal · winter time · summer time · standard time
Built-in sleep-wake cycle
- biological clockInnate cycle regulator
- fatigueWeariness from prolonged exertion
- grogginessState of sluggish disorientation
- melatoninCircadian rhythm regulator
adjustment period · drowsiness · sleep debt · alertness · chronobiology · body clock · insomnia · sleep schedule
Official enactment of statutes
- regulationOfficial rules governing conduct
- debateFormal argument on issues
- federalDivided governmental authority
- stateCondition or mode
compliance · standardization · bill · law · mandate · proposal · European Union · abolition
Pursuit done outside
- leisureFree time for relaxation
- barbecueSlow-cook over coals
- gardeningTending plants recreationally
- golfClub-and-ball course sport
tennis · jogging · cycling · walking · picnic · recreation · patio dining · yard work
Preventing waste or loss
- electricityEnergy from charged particles
- consumptionUsing up of resources
- peak demandMaximum simultaneous consumption level
- gridFramework of intersecting lines
power · utilities · usage · efficiency · energy savings · retail hours · cost reduction
spring forward
Advance clocks one hour
- fall backWithdraw from advance
- adjustmentAlteration to improve fit
- synchronizeAlign timing precisely
reset · hour hand · wall clock · alarm clock · digital clock · analog clock · timepiece · wristwatch · grandfather clock · cuckoo clock
March
Year's third month
spring · autumn · fall · biannual · seasonal · winter time · summer time · standard time
circadian rhythm
Built-in sleep-wake cycle
- biological clockInnate cycle regulator
- fatigueWeariness from prolonged exertion
- grogginessState of sluggish disorientation
melatonin · adjustment period · drowsiness · sleep debt · alertness · chronobiology · body clock · insomnia · sleep schedule
legislation
Official enactment of statutes
- regulationOfficial rules governing conduct
- debateFormal argument on issues
- federalDivided governmental authority
state · compliance · standardization · bill · law · mandate · proposal · European Union · abolition · referendum
outdoor activity
Pursuit done outside
golf · tennis · jogging · cycling · walking · picnic · recreation · patio dining · yard work · evening commute
conservation
Preventing waste or loss
- electricityEnergy from charged particles
- consumptionUsing up of resources
- peak demandMaximum simultaneous consumption level
grid · power · utilities · usage · efficiency · energy savings · retail hours · cost reduction
daylight saving timestandard time
Regional clock convention
normal time · winter time · GMT · UTC · Greenwich Mean Time