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There are several persistent myths regarding the seasons that official sources like NASA frequently address.

Let's break down the verified months for each season, the science behind them, and why we have two separate systems.

In this verified guide, we will settle the confusion once and for all. We will break down the two authoritative methods: the (based on Earth’s tilt and orbit) and the Meteorological Seasons (based on the annual temperature cycle and the calendar year). By the end of this article, you will have fully verified, data-backed answers to match every month with its correct season.

: These happen when the sun passes directly over the equator, resulting in nearly equal parts day and night.

As defined by the National Centers for Environmental Information (NCEI), the meteorological seasons are grouped into three-month periods. According to a 2016 report from NOAA, these are as follows:

: First day of Winter (Shortest day of the year). September Transition (Autumnal/Vernal Equinox) Date : 21, 22, or 23 September Northern Hemisphere : First day of Autumn. Southern Hemisphere : First day of Spring. December Transition (Winter/Summer Solstice) Date : 20, 21, or 22 December

Sources for verification: NOAA (National Centers for Environmental Information), World Meteorological Organization (WMO), NASA’s Astronomical Almanac, and the US Naval Observatory.

For SEO purposes and quick memorization, here is the ultimate verified answer to the keyword query :

Defined by the Earth's position relative to the sun (solstices and equinoxes). Astronomical seasons usually start around the 21st of the month, making the seasons technically overlap with the next month.

: Based on the annual temperature cycle and the 12-month calendar. Meteorologists divide the year into four 3-month periods to make record-keeping and statistical comparisons easier.