Chillier weather, shorter days, hot mugs of apple cider and Halloween decorations aren't the only signs the seasons are changing. It's officially the first day of fall, based on astronomical data.

The Southern Hemisphere’s autumnal equinox will occur later this week, marking the date when day and night are roughly equal ...

The autumnal equinox arrives on 22 September, marking the end of summer and the beginning of autumn, heralding the arrival of chillier weather and the winter months. The autumnal equinox occurs in ...

Day and night will get equal time for a brief moment Monday as much of the world heads into fall. The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere ...

While many people mourn summer with the passing of Labor Day Weekend, the autumnal equinox is the official end of the summer season. The autumnal equinox marks the start of autumn in the Northern ...

The start of spring is almost here. What to know about the equinox - Spring will officially begin this Friday in the Northern ...

What is the autumnal equinox? The autumnal equinox marks the start of autumn in the Northern Hemisphere. The Earth travels around the sun at an angle, and for most of the year, the Earth’s axis is ...