The first day of meteorological winter officially begins Monday morning. Monday is the shortest day of the year, and tonight is the longest night. Each day will get a little longer until June 20th.
| Sunrise | Sunset | Daylength (hours) | |
| Madison: | |||
| December 19, 2020 | 7:25 AM | 4:25 PM | 8:59:51 |
| December 20, 2020 | 7:26 AM | 4:25 PM | 8:59:45 |
| December 21, 2020 | 7:26 AM | 4:26 PM | 8:59:45 |
| December 22, 2020 | 7:27 AM | 4:26 PM | 8:59:48 |
| Milwaukee: | |||
| December 19, 2020 | 7:19 AM | 4:19 PM | 9:00:07 |
| December 20, 2020 | 7:20 AM | 4:20 PM | 9:00:02 |
| December 21, 2020 | 7:20 AM | 4:20 PM | 9:00:01 |
| December 22, 2020 | 7:21 AM | 4:21 PM | 9:00:05 |
source: https://www.esrl.noaa.gov/gmd/grad/solcalc/ and https://www.timeanddate.com/sun/usa
https://www.esrl.noaa.gov/gmd/grad/solcalc/table.php?lat=43.0731&lon=-89.4012&year=2020
https://www.esrl.noaa.gov/gmd/grad/solcalc/table.php?lat=43.0389&lon=-87.9065&year=2020
The Winter Solstice occurs on Monday, December 21st at 4:02 am (10:02 UTC, Dec 21). This is when the Sun is directly overhead at "high noon" at the Tropic Of Capricorn, or -23.5 degrees of latitude south of the equator. The Summer Solstice, on the other hand, is when the sun is directly overhead at "high noon" at the Tropic Of Cancer, or +23.5 degrees latitude north of the equator. The shortest daylight hours of the year are around the Winter Solstice. For more info, go here: https://scijinks.gov/solstice/​
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