Retrograde Calendar
Station times, degrees, durations, and shadow periods for every retrograde of the year — computed astronomy, not folklore.
No planet ever backs up; the loop is a trick of parallax as Earth laps a slower world or is lapped by a faster one. The tradition reads it accordingly. A changes a planet's gear, not its meaning; matters under its sponsorship come round again for review, revision, repair. The days that carry real weight are the , when a planet stands still to turn. Mark those dates, not the whole stretch.
☿︎Mercury retrograde 2100· three times this year
The classic season of crossed wires; three or four short spells a year. Re-read, re-confirm, back up the files; let the signature wait for the turning day if it can.
Retrograde 30 Jan – 20 Feb (3 weeks), 25°58' Aquarius back to 10°26' Aquarius; shadow from 14 Jan to 12 Mar. Stations at 06:29 and 13:44 UT.
Retrograde 29 May – 22 Jun (3 weeks), 23°48' Gemini back to 15°14' Gemini; shadow from 14 May to 07 Jul. Stations at 04:59 and 04:06 UT.
Retrograde 26 Sep – 18 Oct (3 weeks), 24°57' Libra back to 9°40' Libra; shadow from 06 Sep to 02 Nov. Stations at 18:04 and 06:14 UT.
♀︎Venus retrograde 2100· once this year
Retrograde 21 Apr – 02 Jun (6 weeks), 0°09' Gemini back to 13°40' Taurus; shadow from 19 Mar to 06 Jul. Stations at 04:00 and 21:20 UT.
♂︎Mars retrograde 2100· not retrograde this year
Mars holds a straight course through 2100; no spell, no shadow, no station to mark.
The slow planets
Jupiter outward, a planet spends four to five months of every year retrograde; that is ordinary weather, not an event. The slower the planet, the longer the spell and the less it asks of any single day. Mark the stations; the rest is season.
♃︎Jupiter retrograde 2100· once this year
Retrograde 06 Feb – 09 Jun (18 weeks), 23°13' Libra back to 13°18' Libra; shadow from 11 Nov 2099 to 07 Sep. Stations at 12:42 and 17:33 UT.
♄︎Saturn retrograde 2100· once this year
Retrograde 04 Feb – 22 Jun (20 weeks), 26°38' Libra back to 19°54' Libra; shadow from 01 Nov 2099 to 28 Sep. Stations at 04:19 and 13:07 UT.
♅︎Uranus retrograde 2100· once this year
Retrograde 31 Jul – 30 Dec (22 weeks), 25°40' Aries back to 21°43' Aries; shadow from 13 Apr to 16 Apr 2101. Stations at 09:38 and 21:49 UT.
♆︎Neptune retrograde 2100· twice this year
Retrograde 19 Dec 2099 – 25 May (22 weeks), 17°20' Virgo back to 14°33' Virgo; shadow from 29 Aug 2099 to 16 Sep. Stations at 04:58 and 16:24 UT.
Retrograde 21 Dec – 28 May 2101 (23 weeks), 19°32' Virgo back to 16°44' Virgo; shadow from 31 Aug to 19 Sep 2101. Stations at 16:30 and 04:52 UT.
♇︎Pluto retrograde 2100· twice this year
Retrograde 03 Aug 2099 – 15 Jan (24 weeks), 4°20' Taurus back to 2°21' Taurus; shadow from 01 Apr 2099 to 17 May. Stations at 10:30 and 20:19 UT.
Retrograde 04 Aug – 17 Jan 2101 (24 weeks), 5°19' Taurus back to 3°19' Taurus; shadow from 02 Apr to 19 May 2101. Stations at 17:45 and 00:36 UT.
All times Universal Time (UT), from the same engine as the sky. Spells that open or close beyond the calendar year are listed with their own year on the date; the window belongs to both years and appears on both pages. On doctrine: a retrograde conditions a planet's expression; it does not doom it. The working tradition keeps no list of forbidden days, a spell that repeats a is one process rather than three misfortunes, and the shadow is context, not an extension of the sentence. The stations are the moments that matter; what a planet touches while standing still, it means.