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First Days of Seasons 2018

Find equinox and solstice dates for 2018—specifically, the March equinox, the June solstice, the...
Welcome Spring Equinox

Spring Equinox 2018: The First Day of Spring

The spring equinox (also called the March equinox or vernal equinox) falls on Tuesday, March 20,...
March Equinox Fun Facts

Vernal Equinox Oddities

This year, the vernal equinox falls on Tuesday, March 20. Are day and night equal today? Does the...
Groundhog Emerging

Groundhog Day and Shadow Fun

Groundhog Day. Just a bizarre tradition involving rodents? Or, rather, marmots? Actually, Groundhog...
When is First Day of Winter?

The First Day of Winter: Winter Solstice 2017

Winter officially begins with the Winter Solstice on Thursday, December 21, 2017. This is the...
New England Foliage

Fall Foliage Map 2017

See our new fall foliage map for peak times across America. Help us add to this foliage map with...
U.S. Summer Weather Forecast 2017

Summer Weather Forecast

We bring you the 2017 Summer Weather Forecast summary for the U.S. and Canada. When we released The...
The Seasons and Sun Strength

A Better Way to Visualize the Seasons

We’ve grown up with four seasons. But they don’t always match what we experience. What about...
Moon Summer Solstice

Summer Solstice Full Moon in June!

On June  20, 2016, the Full Moon appears on the same night as the summer solstice! It’s rare, all ...
Autumn Leaves Montage

The Autumnal Equinox

Coming up next week is the Blood Moon. Also called the MegaMoon. Or, the Mega Harvest Moon. Or, the...