The standard understanding of the seasons isn’t so clear. What does this mean for changing your Pour Moi Day Creams?
The Seasons are SplitPour Moi is the world’s first climate smart skincare. It has been common knowledge in the beauty industry for decades that some skincare products work best in certain conditions. This is why you load up on heavy creams in the winter and opt for a lightweight moisturizer in the summer. With two different tracks of seasons—astronomical and meteorological—how do you know when to change your Pour Moi Day Cream? The seasons you know and love—fall, winter, spring, and summer—are the astronomical classifications based on the Earth’s position as it revolves around the sun. It takes one year for the Earth to make a full revolution. Throughout this period, the Earth experiences two solstices and two equinoxes—this is how we get our astronomical seasons. The meteorological seasons are distinguished by the annual temperature cycle that coincides with the Gregorian calendar (aka the most widely used calendar). These groupings divide the 12-month annual calendar into 3-month seasons. The concept of warmest season, coolest season, and two transitional seasons are recycled in the meteorological classifications, but they are divided between the correlating months instead of under an umbrella label.
Astronomical: Not as Scary as it SoundsFlashback to your Freshman Geography class where your teacher used intimidating words like “solstice” and “equinox.” In this case, all you need to know is that a solstice is when the sun reaches its highest or lowest point, and an equinox is when the sun crosses the equator. These solar positions affect the length of the day—the two solstices indicate the longest and shortest days of the year, and the two equinoxes mark the days in which day and night are of equal time. Coincidentally, these solar events also set off the first day of the new season. To put these not-so-scary words into application, the astronomical seasons in the Northern Hemisphere are set off around the approximate dates:
- Fall Equinox: September 22
- Winter Solstice: December 22
- Spring Equinox: March 21
- Summer Solstice: June 21
Meteorological: Get to Know the “Other” Four SeasonsThe meteorological seasons were born out of need for a better indication of when seasons change. The official first day of summer this year is June 20, but you might start to feel the warmth and varying humidity before or after this date. So how do the seasons based on Earth’s position link to the seasons based on temperature trends? The two seem mutually exclusive, but the overlap is surprising. Grouping the seasons based on relative temperature patterns looks like this:
- Meteorological fall: September, October, and November
- Meteorological winter: December, January, and February
- Meteorological spring: March, April, and May
- Meteorological summer: June, July, and August