When is Summer 2020 | Summer 2020
SummerStarts:Saturday,Jun202:43pmPDTSummerEnds:Tuesday,Sep226:30amPDTRegion:California/UnitedStatesThefirstdayofsummer(Junesolstice)iswhenthesunisinitsmostnorthernpositiondirectlyovertheTropicofCancer.Thisisreferredtoasastronomicalsummerorthesummersolstice.AstronomicalsummerstartsatdifferenttimesaroundtheplanetbecauseofthedifferenttimezonesasrelatedtoCoordinatedUniversalTime(UTC,sameasGreenwichMeanTimebasedontheRoyalObservatoryinGreenwich,London[1]).ForcountrieslocatedwestofUTCyoursummerwill...
Summer Starts: Saturday, Jun 20 2:43 pm PDT
Summer Ends: Tuesday, Sep 22 6:30 am PDT
Region: California/United States
The first day of summer (June solstice) is when the sun is in its most northern position directly over the Tropic of Cancer. This is referred to as astronomical summer or the summer solstice.
Astronomical summer starts at different times around the planet because of the different time zones as related to Coordinated Universal Time (UTC, same as Greenwich Mean Time based on the Royal Observatory in Greenwich, London [1]). For countries located west of UTC your summer will start earlier than countries located east of UTC.
Astronomical and Meteorological SummerAstronomical Summer is determined by the changing positions of the earth relative to the sun giving us the solstices and equinoxes. Seasons are caused by the tilt of the earth on its axis by 23.5 degrees. The tilt of the earth does not change as it goes around the sun so in t...