Daylight

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Sunrise and sunset Golden hour Day length

Why do days feel shorter in winter? Lookback time: the sunlight you feel now left the Sun eight minutes ago The sidereal day is 4 minutes shorter and that is why stars rise earlier each night An overcast outdoor walk still beats the brightest office lamp Why the tide comes twice a day but spring tides come twice a month Window orientation decides how much daylight a room ever gets Offices with daylight report fewer sick days — evidence and confounds Blackout curtains and the 24-hour sun of a northern summer Vitamin D from sunlight depends on latitude angle and time of day A skylight delivers several times the light of a window of the same area Daylight harvesting: lights that dim themselves when the sun appears Polar night in Tromsø: two months without a sunrise Daylight lengthens fastest at the equinox not the solstice Civil twilight: how long after sunset you can still read outside Why noon light is white and sunset light is orange

Time Management Future Timeline Calendars Time in life Historical eras Time travel Seasons Endings Units of time