Today is the first day of meteorological winter! Because astronomical seasons change each year, meteorologists use the same four three-month blocks to represent seasons, helping to make our weather data consistent. Astronomical winter begins Dec 22. More: noaa.gov/education/reso…
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@NWS @StephanieAbrams Astronomical seasons change each year? By what? 12 hours?
@NWS Most sources show Astronomical winter on the 21st (4:48 p.m. EST). Is the 22nd the "first full day"?