The Rainbow Alphabet Calendar is a calendar reform concept created by Karl Palmen.
It has 52 rainbow weeks named after the letters of the alphabet 'A' to 'Z' and 'a' to 'z'. The days of the rainbow week are Redday, Orangeday, Yellowday, Greenday, Blueday, Indigoday and Violetday. Week 'Z' also has a Magentaday and so does week 'z' in Rainbow leap years.
The Magentadays ensure that there are exactly 52 rainbow weeks in a year. They cause the rainbow week to move relative to the 7 day week. Reddays occur Rainbow Alphabet Years 2006 to 2010 as follows:
2006 Southward Sun Redday = Monday 2007 Northward Sun Redday = Monday Magentaday Z 2007 Southward Sun Redday = Tuesday Magentaday z (leap day) 2008 Northward Sun Redday = Wednesday Magentaday Z 2008 Southward Sun Redday = Thursday 2009 Northward Sun Redday = Thursday Magentaday Z 2009 Southward Sun Redday = Friday 2010 Northward Sun Redday = Friday Magentaday Z 2010 Southward Sun Redday = Saturday
Palmen says he chose the new year so that the Equinoxes occur in week 'M' and 'm' and the solstices in weeks 'Z' and 'z'. The northward equinox occurred on Orangeday M this year.
Leap Magentaday occurs in the year before a Gregorian leap year. Dates followed by a dot are one day later in the Gregorian calendar before or on a February 29.
Below is a conversion table to and from the Gregorian calendar:
Northward Sun Southward Sun
RE OR YE GR BL IN VI RE OR YE GR BL IN VI A 25.26.27.28.29.30.31. Dec a 26 27 28 29 30 1 02 Jul B 1.02.03.04.05.06.07. Jan b 03 04 05 06 07 08 09 Jul C 08.09.10.11.12.13.14. Jan c 10 11 12 13 14 15 16 Jul D 15.16.17.18.19.20.21. Jan d 17 18 19 20 21 22 23 Jul E 22.23.24.25.26.27.28. Jan e 24 25 26 27 28 29 30 Jul F 29.30.31. 1.02.03.04. Feb f 31 1 02 03 04 05 06 Aug G 05.06.07.08.09.10.11. Feb g 07 08 09 10 11 12 13 Aug H 12.13.14.15.16.17.18. Feb h 14 15 16 17 18 19 20 Aug I 19.20.21.22.23.24.25. Feb i 21 22 23 24 25 26 27 Aug J 26.27.28. 1 02 03 04 Mar j 28 29 30 31 1 02 03 Sep K 05 06 07 08 09 10 11 Mar k 04 05 06 07 08 09 10 Sep L 12 13 14 15 16 17 18 Mar l 11 12 13 14 15 16 17 Sep M 19 20 21 22 23 24 25 Mar m 18 19 20 21 22 23 24 Sep RE OR YE GR BL IN VI RE OR YE GR BL IN VI N 26 27 28 29 30 31 1 Apr n 25 26 27 28 29 30 1 Oct O 02 03 04 05 06 07 08 Apr o 02 03 04 05 06 07 08 Oct P 09 10 11 12 13 14 15 Apr p 09 10 11 12 13 14 15 Oct Q 16 17 18 19 20 21 22 Apr q 16 17 18 19 20 21 22 Oct R 23 24 25 26 27 28 29 Apr r 23 24 25 26 27 28 29 Oct S 30 1 02 03 04 05 06 May s 30 31 1 02 03 04 05 Nov T 07 08 09 10 11 12 13 May t 06 07 08 09 10 11 12 Nov U 14 15 16 17 18 19 20 May u 13 14 15 16 17 18 19 Nov V 21 22 23 24 25 26 27 May v 20 21 22 23 24 25 26 Nov W 28 29 30 31 1 02 03 Jun w 27 28 29 30 1 02 03 Dec X 04 05 06 07 08 09 10 Jun x 04 05 06 07 08 09 10 Dec Y 11 12 13 14 15 16 17 Jun y 11 12 13 14 15 16 17 Dec Z 18 19 20 21 22 23 24 Jun z 18 19 20 21 22 23 24 Dec RE OR YE GR BL IN VI RE OR YE GR BL IN VI
Annual Magentaday Leap Magentaday Magentaday Z = June 25th Magentaday z = Dec 25th
External links
- Karl Palmen's Rainbow Alphabet Calendar by Karl Palmen (historic version).
- Karl Palmen's Rainbow Calendars by Karl Palmen (current version).