Retrograde Calendar
About 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 1900· 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 15 Mar – 07 Apr (3 weeks), 9°09' Aries back to 26°31' Pisces; shadow from 01 Mar to 26 Apr. Stations at 13:28 and 18:50 UT.
Retrograde 18 Jul – 11 Aug (3 weeks), 15°15' Leo back to 3°48' Leo; shadow from 30 Jun to 25 Aug. Stations at 12:49 and 15:13 UT.
Retrograde 09 Nov – 29 Nov (3 weeks), 6°17' Sagittarius back to 20°07' Scorpio; shadow from 21 Oct to 17 Dec. Stations at 23:32 and 21:37 UT.
♀︎Venus retrograde 1900· once this year
Retrograde 16 Jun – 30 Jul (6 weeks), 24°00' Cancer back to 7°29' Cancer; shadow from 14 May to 01 Sep. Stations at 22:21 and 02:29 UT.
♂︎Mars retrograde 1900· not retrograde this year
Mars holds a straight course through 1900; 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 1900· once this year
Retrograde 27 Mar – 29 Jul (18 weeks), 10°52' Sagittarius back to 1°00' Sagittarius; shadow from 31 Dec 1899 to 24 Oct. Stations at 21:19 and 02:23 UT.
♄︎Saturn retrograde 1900· once this year
Retrograde 14 Apr – 02 Sep (20 weeks), 5°02' Capricorn back to 28°25' Sagittarius; shadow from 07 Jan to 09 Dec. Stations at 06:52 and 15:10 UT.
♅︎Uranus retrograde 1900· once this year
Retrograde 17 Mar – 17 Aug (22 weeks), 12°28' Sagittarius back to 8°27' Sagittarius; shadow from 03 Dec 1899 to 01 Dec. Stations at 19:29 and 18:39 UT.
♆︎Neptune retrograde 1900· twice this year
Retrograde 30 Sep 1899 – 05 Mar (22 weeks), 27°01' Gemini back to 24°12' Gemini; shadow from 08 Jun 1899 to 26 Jun. Stations at 06:03 and 17:30 UT.
Retrograde 02 Oct – 08 Mar 1901 (22 weeks), 29°15' Gemini back to 26°26' Gemini; shadow from 11 Jun to 29 Jun 1901. Stations at 17:43 and 06:30 UT.
♇︎Pluto retrograde 1900· twice this year
Retrograde 16 Sep 1899 – 27 Feb (23 weeks), 16°42' Gemini back to 14°41' Gemini; shadow from 15 May 1899 to 30 Jun. Stations at 11:11 and 15:04 UT.
Retrograde 17 Sep – 28 Feb 1901 (23 weeks), 17°41' Gemini back to 15°41' Gemini; shadow from 16 May to 01 Jul 1901. Stations at 20:04 and 17:45 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.