2019-08-06 - Reformed Rational Calendar
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Introduction

Problems with systematic calendars (syscals)

Triskadekaphobia

  Many syscals provide 13 months. This is unpopular for many
  reasons. You can argue against this objection all you want, the
  fact remains that, in many cultures, 13 is unacceptable.

Unfamiliar Days

  Many syscals provide new day names, such as the French Republican
  Calendars unidi, duodi &c. These have a certain attraction, but
  they are not without problems, mainly the erosion of cultural
  reference points.

Loss of Weekends

  Syscals which excessively focus on rationality (FRC, New
  Calendar) reduce the `rest days`. This was one of the
  contributing reasons for the failure of the French Republican
  Calendar.

Unfamiliar Terminology

  Many syscals refer to incongruous naming schemes, like `bimonth`.

Loss of Holidays

  Many syscals overturn or move traditional holidays (Thanksgiving
  &c). People *really* like their holidays; many of them have been
  obtained through the force of organised labour; others
  commemorate the deeds of the past and are part of national,
  regional and supra-national identity.

Loss of Productivity

  Conversely to the above, some syscals actually increase the
  number of days people are not working. This leads to strong
  objections from the Capitalist classes; until such time as these
  objections can be rejected there needs to be some consistency.

Loss of Traditional Measure

  By altering week length, or dividing months differently, many
  religious or traditional elements are lost or become overly
  complex. A new calendar should not minimise impact on these old
  calculations.


Problems with Julian/Gregorian System

I'm not proposing to delve too deeply into the problems with the
current system. Anyone who has any interest in Calendrical Reform
knows these issues. To keep it short, there are three primary
complaints, viz:-

 - Unequal Months
 - Shifting Days
 - Overly Rigid

So, what should a reformed Calendar do?

In order to minimise friction, a reformed calendar should:-

  Retain month structure as much as possible
  Retain local naming conventions
  Retain Holidays
  Retain Weekends
  Retain Productivity
  Retain Traditional Measures
  Retain 7 Day Week

My Modest Proposal

Use ancient structure for new

  A Reformed Calendar should look to the original calendars used
  by humans. Many early cultures, and their descendants today,
  concentrate on the Solstices.

  A Reformed Calendar should acknowledge the Holiday 'seasons'
  which occur at Solstice


12 Months of 28 Days

  Beginning on Jan 1, each month is the same length.
  Each Month (or Month Ordinary) retains its traditional local name
  Each day retains its traditional local name
  Each traditional local holiday remains largely in place, with
  some exceptions.


Plus: 2 Half-Months of 14 Days

  Located after June and after December
  Coterminous with Midsummer and Midwinter Solstices

Kalends Days

  One *Kalends* at the end of each year, after the Winter(NH),
  before the start of the new year.

  One *Ides* every four years, after the Summer(NH)


Issues

Doesn't work for other religions

  Judaism (for instance) relies on a 7-day week, and does not allow
  `intercalenary` days.


Birthdays

  Because the calendar is quite different, birth dates from the
  Gregorian calendar do not neatly align. This can be assuaged
  somewhat by taking the absolute year-day, and mapping this to the
  new calendar.

Sample

  ┌────
  │    January                February                March
  │    Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
  │     1  2  3  4  5  6  7    1  2  3  4  5  6  7    1  2  3  4  5  6  7
  │     8  9 10 11 12 13 14    8  9 10 11 12 13 14    8  9 10 11 12 13 14
  │    15 16 17 18 19 20 21   15 16 17 18 19 20 21   15 16 17 18 19 20 21
  │    22 23 24 25 26 27 28   22 23 24 25 26 27 28   22 23 24 25 26 27 28
  │
  │    April                  May                   June
  │    Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
  │     1  2  3  4  5  6  7    1  2  3  4  5  6  7    1  2  3  4  5  6  7
  │     8  9 10 11 12 13 14    8  9 10 11 12 13 14    8  9 10 11 12 13 14
  │    15 16 17 18 19 20 21   15 16 17 18 19 20 21   15 16 17 18 19 20 21
  │    22 23 24 25 26 27 28   22 23 24 25 26 27 28   22 23 24 25 26 27 28
  │
  │    Summer                 July                   August
  │    Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
  │     1  2  3  4  5  6  7    1  2  3  4  5  6  7    1  2  3  4  5  6  7
  │     8  9 10 11 12 13 14    8  9 10 11 12 13 14    8  9 10 11 12 13 14
  │                           15 16 17 18 19 20 21   15 16 17 18 19 20 21
  │    (Ides)                 22 23 24 25 26 27 28   22 23 24 25 26 27 28
  │
  │    September              October                November
  │    Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
  │     1  2  3  4  5  6  7    1  2  3  4  5  6  7    1  2  3  4  5  6  7
  │     8  9 10 11 12 13 14    8  9 10 11 12 13 14    8  9 10 11 12 13 14
  │    15 16 17 18 19 20 21   15 16 17 18 19 20 21   15 16 17 18 19 20 21
  │    22 23 24 25 26 27 28   22 23 24 25 26 27 28   22 23 24 25 26 27 28
  │
  │    December               Winter
  │    Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
  │     1  2  3  4  5  6  7    1  2  3  4  5  6  7
  │     8  9 10 11 12 13 14    8  9 10 11 12 13 14
  │    15 16 17 18 19 20 21
  │    22 23 24 25 26 27 28   Kalends
  └────