The astronomical start of summer – which is marked by the summer solstice each year – is still yet to come, falling on this Friday, June 20. When are 2025 solstices and equinoxes?

The solstice is the end of the sun's annual march higher in the sky, when it makes its longest, highest arc. The bad news for sun lovers: It then starts retreating and days will get a little ...

The summer solstice was on a Thursday this year, on June 20 at 4:51 p.m. EDT. And the autumnal equinox is right around the corner, on Sunday, September 22 at 8:44 A.M. EDT, according to The ...

Firstly, these phenomena can be divided into two categories:Equinoxes, and Solstices. An equinox occurs only twice a year, at a specific point in the sun’s orbit–when it crosses the equator.

When it reached certain points, equinoxes and solstices, humans could demarcate the beginning and end of the seasons. Happy #TimelapseTuesday and #FirstDayOfSpring! 🌸🐣 ...

But that’s about to reverse itself. Winter solstice, the shortest day of the year and the official first day of winter, is on Saturday, December 21, this year (well, for the vast bulk of the world’s ...

Though equinoxes might not get the same attention as solstices, they're a lovely way to observe the seasons shifting. Let's get to know the vernal equinox, what it is and why it happens.