Calendar Gallery

A few possible arrangements of the fixed year

theAbysmal Calendar is an ongoing experiment in exploring time, art, calendars, and mythology as means of founding interdependent relationships between communities.

While the basic structure of theAbysmal Calendar is aligned with the Solstices & Equinoxes, the goal has been to harmonize as many of the features used in calendars and daykeeping systems. Many of these arrangements are used elsewhere, however theAbysmal synchronizes all of its measures to the Seasons.

the Lunar Calendars count all of the days, lunar months, and years without exception. All observational phenomena (planetary cycles, comets, precession, solar cycles, etc.) are recorded here.

the Solar Calendars that follow are regular divisions of the 365-day year.

Market Week Calendars are synchronized to the 365-day year, but repeat themselves along shorter periods, and synchronize with the solar year over longer periods.

theAbysmal Lunar Calendars

theAbysmal uses two lunar calendars: one that counts every measure linearly, and another that relates days to the lunar month, and lunar month to the year.

animation of the Moon's face going through the phases from new to full to new.

Lunar Calendar

this is a linear count of days, Moons, Years as well as periodic astronomical phenomena (planetary cycles, eclipses, etc).

theAbysmal Epoch began May 26 1492, however, theAbysmal Era 2 began Jun 19 2012, and the numbers count from this date.

circular lunar month page for Year 9 Moon 122. Circles represent the days from 3602 to 3631
Year 9, Moon `122, Days 3602 to 3631
circular lunar month page. Circles represent the days from Apr 30 to May 29

Lunisolar Calendar

the Lunisolar Calendar numbers the Moons of the Year 0 to 11 or 12, and the Days of the Moon 0 to 28 or 29.

circular lunar month 11 for year 9 page. Circles represent the days from 0 to 29
theAbysmal Solilunar Calendar
Year 9, Moon 11, Days 0 to 29
circular lunar month page. Circles represent the days from Apr 30 to May 29
Moon 122 with Gregorian Dates in 2022

theAbysmal Solar Calendars

theAbysmal Solar Calendars are synchronized with the Seasons. While many of these are the result of dividing the year into equal numbers of weeks and months, others resulted from experimenting with mathematical formulas.

First, the Wheel of the Year which frames the symmetrical solar year.

Second, the more familiar “months” of the year, where the formula is presented as:

365 = months/year x weeks/month x days/week + additional days

Weeks range from 5 to 13 days.
Months range from 3 to 5 weeks.

These are represented as regular rectangles.

Third, irregular months – those with weeks of different measures.

Fourth, accelerating weeks – these are weeks that become progressively longer and shorter through the year. These are triangle numbers.

Fifth, experimental divisions of the solar year.

Sixth, market week calendars, which apply symbols to the days.

a circle divided into four by an X. At bottom and moving clockwise, the colour of each quarter is Blue, Green, Yellow, and Red.

N.B. there are two colour patterns. The first are the four colours for the cardinal directions: blue North, green East, yellow South, and red West. The second assigns a shade to each of the 365 days of the year, represented as circles.

Wheel of the Year

365 = 4 x 91 + 1

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring is made up of 365 circles, each of which is shaded a unique hue.Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue. This ring is divided by 8 spokes.

Regular Months of the Year

24-Hōra Year

365 = 24 x 3 x 5 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 24 rectangles, each of which is made of 3 by 5 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

20-Month Year

365 = 20 x 3 x 6 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 20 rectangles, each of which is made of 3 by 6 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

18-Month Year

365 = 18 x 4 x 5 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 18 rectangles, each of which is made of 4 by 5 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

15-Month Year by 6-day week

365 = 15 x 4 x 6 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 15 rectangles, each of which is made of 4 by 6 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

15-Month Year by 8-day week

365 = 15 x 3 x 8 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 15 rectangles, each of which is made of 3 by 8 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

13-Month Year

365 = 13 x 4 x 7 + 1

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are thirteen rectangles, each of which is made of 4 by 7 circles. Each circle is shaded a particular hue. From bottom right progressing clockwise, the circles range from blue to turquoise, the next from turquoise to green-blue, then to green, then lighter green, then green-yellow, then yellow-green, then at centre, a rectangle of mostly yellow circles, then orange, red-oragne, red, deep red, plum-purple, indigo-blue.

12-Month Year by 6-day week

365 = 12 x 5 x 6 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 12 rectangles, each of which is made of 5 by 6 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

12-Month Year by 10-day week

365 = 12 x 3 x 10 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 12 rectangles, each of which is made of 3 by 10 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

11-Month Year

365 = 11 x 3 x 11 + 2

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are eleven rectangles, each of which is made of 3 by 11 circles. Each circle is shaded a particular hue. From top right progressing clockwise, the circles range from yellow to orange, then orange to red, then reds, then purples, then purple to blue, then the middle rectangle is blues, then blue to turquoise, turquoise to green, greens, green to yellow-green, yellow-green to yellow.

10-Month Year by 9-day week

365 = 10 x 4 x 9 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 10 rectangles, each of which is made of 4 by 9 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

10-Month Year by 12-day week

365 = 10 x 3 x 12 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 10 rectangles, each of which is made of 3 by 12 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

9-Month Year by 8-day week

365 = 9 x 5 x 8 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 9 rectangles, each of which is made of 5 by 8 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

9-Month Year by 10-day week

365 = 9 x 4 x 10 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 9 rectangles, each of which is made of 4 by 10 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

8-Month Year

365 = 9 x 5 x 8 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 8 rectangles, each of which is made of 5 by 9 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

7-House Year

365 = 7 x 4 x 13 + 1

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are seven rectangles, each of which is made of 4 by 13 circles. Each circle is shaded a particular hue. From bottom right progressing clockwise, the circles range from blue to turquoise, the next from green-blue to green, then to green to green-yellow, to yellow, to orange, red to purple, purple to blue.

6-Month Year

365 = 6 x 5 x 12 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 6 rectangles, each of which is made of 5 by 12 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

Irregular Months of the Year

19-Month Year

365 = 192 + 4
= 19 x (6 + 7 + 6) + 4

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 19 rectangles, each of which is made of 3 rows of 6, 7, and 6 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

13-Month Year

365 = 52 + 132 + 132 + 2

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 13 rectangles, 8 of which are made of 2 rows of 13, and 5 of which are made of 3 rows of alternating 13, 5, 13. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

11-Month Year

365 = 102 + 112 + 122
= 5 x (12 + 11 + 10) + (12 + 11 + 12) + 5 x (10 + 11 + 12)

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 11 rectangles, each of which is made of 3 rows of alternating 12 11 and 10 circles with the exception of the middle rectangle of 12, 11, and 12 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

9-Month Year

365 = 132 + 142
= 5 x (14 + 13 + 14) + 4 x (13 + 14 + 13)

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 9 rectangles, each of which is made of 3 rows of alternating 14 or 13 circles. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

Accelerating Divisions of the Year

In mathematics, these are triangle figurate numbers. In practice, they create a series of weeks where each successive week is one day shorter than the previous, until it gets down to 1, then the following measure is one day longer until reaching the maximum.

24 Hōra

365 = 24 x (5 + 4 + 3 + 2 + 1) + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. 24 triangles point to this circle. Each is made up of rows of circles, beginning with 5 at the outside, then 4, 3, 2, and 1. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue.

13 Months (28)

365 = 13 x (7 + 6 + 5 + 4 + 3 + 2 + 1) + 1

10 Months (36)

365 = 10 x (8 + 7 + 6 + 5 + 4 + 3 + 2 + 1) + 5

concentric rings. At centre is a circle with four colours that swirl clockwise: red, blue, green, yellow. 10 triangles point to this circle. Each is made up of rows of circles, beginning with 8 at the outside, then 7, 6, and so on to the top 1. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue. The outermost ring is a circle of 256 quadrigrams - images of four vertical lines cycling through the four colours in 256 variations with four blue lines at bottom, four green at left, four yellow at top, and four red at right.

8 Months (45)

365 = 8 x (9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1) + 5

concentric rings. At centre is a circle with four colours that swirl clockwise: red, blue, green, yellow. 8 triangles point to this circle. Each is made up of rows of circles, beginning with 9 at the outside, then 8, 7, and so on to the top 1. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue. The outermost ring is a circle of 256 quadrigrams - images of four vertical lines cycling through the four colours in 256 variations with four blue lines at bottom, four green at left, four yellow at top, and four red at right.

4 Quarters

365 = 4 x (13 + 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1) + 1

concentric rings. At centre is a circle with four colours that swirl clockwise: red, blue, green, yellow. Four triangles point to this circle. Each is made up of rows of circles, beginning with 13 at the outside, then 12, 11, and so on to the top 1. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue. The outermost ring is a circle of 256 quadrigrams - images of four vertical lines cycling through the four colours in 256 variations with four blue lines at bottom, four green at left, four yellow at top, and four red at right.

3 Terms

365 = 3 x (15 + 14 + 13 + 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1) + 5

concentric rings. At centre is a circle with four colours that swirl clockwise: red, blue, green, yellow. 3 triangles point to this circle. Each is made up of rows of circles, beginning with 15 at the outside, then 14, 13, and so on to the top 1. Each circle is shaded a particular hue. Clockwise from bottom, they progress from blue through blue-green, green at left, then green-yellow, yellow at top, then orange, red at right, purple, and back to blue. The outermost ring is a circle of 256 quadrigrams - images of four vertical lines cycling through the four colours in 256 variations with four blue lines at bottom, four green at left, four yellow at top, and four red at right.

Square Divisions of the Year

The 365 days of the year can be organized as a series of squares – from the 4-day and 9-day weeks, to the 36-day month, and 361-day year.

10-Square Year

365 = 10 x 62 + 5

concentric rings - at centre, a circle divided into four quarters that swirl clockwise. From bottom of the circle the colours are blue, green, yellow, red. The first ring around this is made of 16 bigrams - one line on top of the other in each of the combination of the four colours. The circle around this are the 64 trigrams of three lines. At the outside are the 256 quadrigrams. The outermost ring are 10 squares made up of 6 by 6 circles. Each circle is shaded a particular colour, from blue at bottom up through green on the left to yellow at the top back down through orange and red at the right, then violet and back to blue.

1-Square Year

365 = 192 + 4

a square made up of 19 by 19 circles. Ezch circle is shaded unique colour from yellow at bottom and progressing by row through orange, red, violet, blue, green, and yellow.

3-D Divisions of the Year

Tetrahedral Year

365 = 364 + 1
= 1 + 3 + 6 + 10 + 15 + 21 +28 + 36 + 45 + 55 + 66 +78 + 1
= 1 +
2 + 1 +
3 + 2 + 1 +
4 + 3 + 2 + 1 +
5 + 4 + 3 + 2 + 1 +
6 + 5 + 4 + 3 + 2 + 1 +
7 + 6 + 5 + 4 + 3 + 2 + 1 +
8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 +
9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 +
10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 +
11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 +
12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 +3 + 2 + 1 +
1

a tretrahedron made of 12 layers of tetrahedra. From top down, the individual tetrahedra are blue for about the top five frows, fading to green for the middle three layers, then yellow, orange, red, and finally blue.
The 364-day tetrahedron
A tetrahedron made up of tetradehedra, each of which is shaded a particular colour. The 12 layers are sperarted to reveal each of the 364 eleemnts. The top is blue, the next four layers are blue fading to green, the next three layers are green, the ninth layer is green fading to yellow, the tenth is yellow fading to orange, the eleventh is orange fading to red, and finally red to violet to blue.
12 layers of the 364-day tetrahedron

Experimental Divisions of the Year

Binary Year

365 = 20 + 22 + 23 + 25 + 26 + 28
= 1 + 4 + 8 + 32 + 64 + 256

illustration of five concentric rings of circles. The central circle is divided into four colours: blue at bottom, green at left, yellow at top, and red at right. The ring around it consissts of four circles coloured turquoise, olive, orange, and violet. The next ring consists of eigth circles which consist of intermediary colours between the blue, turquois, green, olive, yellow, orange, violet, and blue. The next rings are 32, 64, and 256 circles, each in intermediary shades of the previous colours.

Sierpiński Year

365 = 30 + 31 + 32 + 33 + 34 + 35 + 1
= 1 + 3 + 9 + 27 + 81 +243 + 1

a series of six diminishing fractal triangles. At right, a sngle triangle pointed down. To its left, three triangles make a triangle with a hollow centre pointed up. to its left, a triangle made up of three of these hollow triangles pointed down. The next triangle is three of those pointed up, the next three pointed down and the largest pointed up. Each individual triangle is shaded a single colour, such that the overall effect from right to left is from green through blue and in the largest triangle, purple, red, orange, yellow, and green.
the Fractal Year

Multi-Year Calendars

27 months over 2 years

36 = 272 = 729
729 + 1 = 730 = 2 x 365

a graphic representation of 27 months over 2 years. Each month is a rectangle made of 9 by 3 circles. The months are arranged radially - 13 around the first circle, then one single month, then 13 around the second circle. The days are shaded from blue to green to yellow to red to blue again.

27 months of 27 days over 2 years

8 months over 3 years

3 x 365 = 17 x 26 + 7 = 1095 days

Trying to accomodate the 17-day period.

Market Week Calendars

These calendars provide symbolism to the days. they are synchronized with the 365 days of the year, and so do not apply to the Leap Day.

260-Day Calendar

260 = 13 x 20

260-day calendar arranged in 20 rows and 13 columns. The header for the rows are labelled by roman numerals one to twenty and named in the following sequence: turtle, wind, night, web, sperpent, death, deer, rabbit, moon, coyote, raccoon, mushroom, tobacco, bear, goshawk, fisher, earthquake, mirror, storm, sun. The rows are coloured green, blue, red, yellow from top to bottom. The days are numbered from top left to bottom right with the numbers 1 to 13.
13 by 20 days

256-Day Calendar

256 = 4 x 4 x 4 x 4
= ((22)2)2

256 qudrigrams. Each is a stack of four lines. each line is coloured either red, yellow, green, or blue. Beginning at top left, the quadrigram is four red lines, to the right, a yellow line with three red above. Next is green with three red. Next is blue with three red. Next is red yellow red red. Then yellow yellow red red. Then green yellow red red. Then blue yellow red red. This cycles through all the 256 permutations. At halfway, three blue and yellow is followed by three red and green. The last is four blue lines.
256 quadrigrams

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