Interested in what you just read?
Subscribe to the newsletter The ephemerides : everything that will happen in the sky during the coming month: what to watch, where to watch? All our newsletters
On Tuesday, June 21, at 9:13 a.m. UT (i.e. 11:13 a.m. local time in mainland France), it will be for thenorthern hemisphere the beginning of summer. At midday, the Sun will culminate high in the sky. It will also be the longest day and the shortest night. In the northern part of France, there will no longer be a totally dark night until mid-August.
For’southern hemisphere, the phenomenon will be reversed: shortest day and longest night. For this part of the globe, it is the winter solstice.
For the northern hemisphere, the duration of the day, which was increasing until now, will now decrease. The phenomenon will be opposite in the southern hemisphere. Day length will decrease in the Northern Hemisphere and increase in the Southern Hemisphere until day and night lengths are equal across the globe. This will mark theautumnal equinox for the northern hemisphere, and thespring equinox for the southern hemisphere.