REGULAR CALENDAR YEAR 136

Congratulations on choosing this calendar. The problem with the calendar you

used previously and that many less knowledgeable people still use is its irregu-

larities: months have different numbers of days, there is no correspondence

between the days of the week and the date and there is no year-to-year consis-

tency in the correspondence between day and date. This calendar is called the

Regular calendar because it eliminates these irregularities. The Regular calen-

dar year is divided into 13 months, each with four seven-day weeks. This ac-

counts for 364 days. The 365th day of the year is in no month. It is the first day

of the year and is called New Year’s Day. Every four years a day is added im-

mediately after New Year’s Day, making a second New Year’s Day. The first

New Year’s Day is always on the vernal equinox. This is consistent with the

beginning of the growing season in the northern hemisphere and with what

many people feel is rejuvenation.

The Regular calendar is not the first calendar revision to propose thirteen 28-

day months per year. For example, in 1849 Auguste Comte created the Posi-

tivist calendar. A later revision yielded the International Fixed calendar. Al-

though never adopted by any country, the International Fixed calendar was the

official calendar of the Eastman Kodak Company from 1928 to 1989.

Since not everyone is as wise as you, many people will continue to use the

calendar you have been using, the Gregorian calendar. Therefore, the Gregor-

ian calendar days and dates are noted on this calendar as well. To avoid con-

fusion, the Regular calendar features names of weekdays and months, different

from those on the Gregorian calendar.

The first workday day of the Regular calendar week is Firstday. This is consis-

tent with referring to the last two days as the weekend. (It is also consistent

with Monday being the first day of the week on the Gregorian calendar, as

specified by the International Organization for Standardization.)

The other Regular calendar days follow in order: Seconday, Thirday,

Fourthday, Fifthday, Sixthday, and Seventhday. As befits a regular calen-

dar, the names of the months are regular, composed of three-letter words

beginning and ending in the same consonant with an a in the middle,

proceeding in alphabetical order; e.g., Bab, Dad, Faf, and so on. C is

omitted because the sound is the same as K and J and Q are omitted

because they would be difficult to pronounce.

Keeping New Year’s Day on the Vernal Equinox

If the time for the Earth to travel around the sun were exactly 365.25

days, a leap day every four years would keep events such as the vernal

equinox around the same date forever. However, according to the NASA

Atmosphere-Ocean Model, the time for the Earth to travel around the sun

is 10.8 minutes less than 365.25 days. Rather than 365 days, 6 hours, it

takes 365 days, 5 hours, 49 minutes, 12 seconds. This means that in

approximately 133 years, a leap year every four years overcorrects by a

full day, and the following leap year is skipped to keep the vernal equinox

on the same date.

The first day of the Regular calendar is March 21, 1875 on the Gregorian

calendar, because the vernal equinox occurred at exactly midnight be-

tween the 20th and 21st that year. The time of the vernal equinox is

earlier in the day each leap year until Regular year 132. By the following

leap year, year 136, the vernal equinox has moved to the next day, so the

extra day is not added in that year. It is a “skip year.” In year 136 the

equinox is not exactly at midnight, however, and the time after midnight is

added to the next cycle, causing the following skip year to be in 132

years. See the Table for additional skip years.

THE REGULAR CALENDAR

Cycle 1 Cycle 2 Cycle 3

Leap

YearsYear Date Year Date Hour Minute

Leap

Years Year Date Year Date Hour Minute

Leap

Years Year Date Year Date Hour Minute

1* 0 1/1 1875 3/21 0 0 1* 136 1/1 2011 3/20 23 31 1* 268 1/1 2143 3/20 23 464 4 1/1 1879 3/20 23 17 4 140 1/1 2015 3/20 22 48 4 272 1/1 2147 3/20 23 28 8 1/1 1883 3/20 22 34 8 144 1/1 2019 3/20 22 5 8 276 1/1 2151 3/20 22 19

12 12 1/1 1887 3/20 21 50 12 148 1/1 2023 3/20 21 22 12 280 1/1 2155 3/20 21 3616 16 1/1 1891 3/20 21 7 16 152 1/1 2027 3/20 20 38 16 284 1/1 2159 3/20 20 5320 20 1/1 1895 3/20 20 24 20 156 1/1 2031 3/20 19 55 20 288 1/1 2163 3/20 20 1024 24 1/1 1899 3/20 19 41 24 160 1/1 2035 3/20 19 12 24 292 1/1 2167 3/20 19 2628 28 1/1 1903 3/21 18 58 28 164 1/1 2039 3/20 18 29 28 296 1/1 2171 3/20 18 4332 32 1/1 1907 3/21 18 14 32 168 1/1 2043 3/20 17 46 32 300 1/1 2175 3/20 18 036 36 1/1 1911 3/21 17 31 36 172 1/1 2047 3/20 17 2 36 304 1/1 2179 3/20 17 1740 40 1/1 1915 3/21 16 48 40 176 1/1 2051 3/20 16 19 40 308 1/1 2183 3/20 16 3444 44 1/1 1919 3/21 16 5 44 180 1/1 2055 3/20 15 36 44 312 1/1 2187 3/20 15 5048 48 1/1 1923 3/21 15 22 48 184 1/1 2059 3/20 14 53 48 316 1/1 2191 3/20 15 752 52 1/1 1927 3/21 14 38 52 188 1/1 2063 3/20 14 10 52 320 1/1 2195 3/20 14 2456 56 1/1 1931 3/21 13 55 56 192 1/1 2067 3/20 13 26 56 324 1/1 2199 3/20 13 4160 60 1/1 1935 3/21 13 12 60 196 1/1 2071 3/20 12 43 60 328 1/1 2203 3/21 12 5864 64 1/1 1939 3/21 12 29 64 200 1/1 2075 3/20 12 0 64 332 1/1 2207 3/21 12 1468 68 1/1 1943 3/21 11 46 68 204 1/1 2079 3/20 11 17 68 336 1/1 2211 3/21 11 3172 72 1/1 1947 3/21 11 2 72 208 1/1 2083 3/20 10 34 72 340 1/1 2215 3/21 10 4876 76 1/1 1951 3/21 10 19 76 212 1/1 2087 3/20 9 50 76 344 1/1 2219 3/21 10 580 80 1/1 1955 3/21 9 36 80 216 1/1 2091 3/20 9 7 80 348 1/1 2223 3/21 9 2284 84 1/1 1959 3/21 8 53 84 220 1/1 2095 3/20 8 24 84 352 1/1 2227 3/21 8 3888 88 1/1 1963 3/21 8 10 88 224 1/1 2099 3/20 7 41 88 356 1/1 2231 3/21 7 5592 92 1/1 1967 3/21 7 26 92 228 1/1 2103 3/21 6 58 92 360 1/1 2235 3/21 7 1296 96 1/1 1971 3/21 6 43 96 232 1/1 2107 3/21 6 14 96 364 1/1 2239 3/21 6 29100 100 1/1 1975 3/21 6 0 100 236 1/1 2111 3/21 5 31 100 368 1/1 2243 3/21 5 46104 104 1/1 1979 3/21 5 17 104 240 1/1 2115 3/21 4 48 104 372 1/1 2247 3/21 5 2108 108 1/1 1983 3/21 4 34 108 244 1/1 2119 3/21 4 5 108 376 1/1 2251 3/21 4 19112 112 1/1 1987 3/21 3 50 112 248 1/1 2123 3/21 3 22 112 380 1/1 2255 3/21 3 36116 116 1/1 1991 3/21 3 7 116 252 1/1 2127 3/21 2 38 116 384 1/1 2259 3/21 2 53120 120 1/1 1995 3/21 2 24 120 256 1/1 2131 3/21 1 55 120 388 1/1 2263 3/21 2 10124 124 1/1 1999 3/21 1 41 124 260 1/1 2135 3/21 1 12 124 392 1/1 2267 3/21 1 26128 128 1/1 2003 3/21 0 58 128 264 1/1 2139 3/21 0 29 128 396 1/1 2271 3/21 0 43132 132 1/1 2007 3/21 0 14

* Not a leap year because it is the first year of a cycle, it would otherwise be a leap year.

SKIP YEAR CYCLES

Based on the NASA Atmosphere-Ocean Model of the Vernal Equinox

Regular Gregorian Regular Gregorian Time Time TimeRegular Gregorian

NEW YEAR’S DAY REGULAR YEAR 136

HAPPY NEW YEAR

March 20 Gregorian Year 2011

Gregorian year 2011 BAB Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

1 1 March 21 2 March 22 3 March 23 4 March 24 5 March 25 6 March 26 7 March 27

2 8 March 28 9 March 29 10 March 30 11 March 31 12 April 1 13 April 2 14 April 3

3 15 April 4 16 April 5 17 April 6 18 April 7 19 April 8 20 April 9 21 April 10

4 22 April 11 23 April 12 24 April 13 25 April 14 26 April 15 27 April 16 28 April 17

Gregorian year 2011 DAD Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

5 1 April 18 2 April 19 3 April 20 4 April 21 5 April 22 6 April 23 7 April 24

6 8 April 25 9 April 26 10 April 27 11 April 28 12 April 29 13 April 30 14 May 1

7 15 May 2 16 May 3 17 May 4 18 May 5 19 May 6 20 May 7 21 May 8

8 22 May 9 23 May 10 24 May 11 25 May 12 26 May 13 27 May 14 28 May 15

Gregorian year 2011 FAF Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

9 1 May 16 2 May 17 3 May 18 4 May 19 5 May 20 6 May 21 7 May 22

10 8 May 23 9 May 24 10 May 25 11 May 26 12 May 27 13 May 28 14 May 29

11 15 May 30 16 May 31 17 June 1 18 June 2 19 June 3 20 June 4 21 June 5

12 22 June 6 23 June 7 24 June 8 25 June 9 26 June 10 2 June 11 28 June 12

Gregorian year 2011 GAG Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

13 1 June 13 2 June 14 3 June 15 4 June 16 5 June 17 6 June 18 7 June 19

14 8 June 20 9 June 21 10 June 22 11 June 23 12 June 24 13 June 25 14 June 26

15 15 June 27 16 June 28 17 June 29 18 June 30 19 July 1 20 July 2 21 July 3

16 22 July 4 23 July 5 24 July 6 25 July 7 26 July 8 27 July 9 28 July 10

Gregorian year 2011 HAH Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

17 1 July 11 2 July 12 3 July 13 4 July 14 5 July 15 6 July 16 7 July 17

18 8 July 18 9 July 19 10 July 20 11 July 21 12 July 22 13 July 23 14 July 24

19 15 July 25 16 July 26 17 July 27 18 July 28 19 July 29 20 July 30 21 July 31

20 22 August 1 2 3 August 2 24 August 3 25 August 4 26 August 5 27 August 6 28 August 7

Gregorian year 2011 KAK Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

21 1 August 8 2 August 9 3 August 10 4 August 11 5 August 12 6 August 13 7 August 14

22 8 August 15 9 August 16 10 August 17 11 August 18 12 August 19 13 August 20 14 August 21

23 15 August 22 16 August 23 17 August 24 18 August 25 19 August 26 20 August 27 21 August 28

24 22 August 29 23 August 30 24 August 31 25 September 1 26 September 2 27 September 3 28 September 4

Gregorian year 2011 LAL Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

25 1 September 5 2 September 6 3 September 7 4 September 8 5 September 9 6 September 10 7 September 11

26 8 September 12 9 September 13 10 September 14 11 September 15 12 September 16 13 September 17 14 September 18

27 15 September 19 16 September 20 17 September 21 18 September 22 19 September 23 20 September 24 21 September 25

28 22 September 26 23 September 27 24 September 28 25 September 29 26 September 30 27 October 1 28 October 2

Gregorian year 2011 MAM Regular year

136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

29 1 October 3 2 October 4 3 October 5 4 October 6 5 October 7 6 October 8 7 October 9

30 8 October 10 9 October 11 10 October 12 11 October 13 12 October 14 13 October 15 14 October 16

31 15 October 17 16 October 18 17 October 19 18 October 20 19 October 21 20 October 22 21 October 23

32 22 October 24 23 October 25 24 October 26 25 October 27 26 October 28 27 October 29 28 October 30

Gregorian year 2011 NAN Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

33 1 October 31 2 November 1 3 November 2 4 November 3 5 November 4 6 November 5 7 November 6

34 8 November 7 9 November 8 10 November 9 11 November 10 12 November 11 13 November 12 14 November 13

35 15 November 14 16 November 15 17 November 16 18 November 17 19 November 18 20 November 19 21 November 20

36 22 November 21 23 November 22 24 November 23 25 November 24 26 November 25 27 November 26 28 November 27

Gregorian year 2011 PAP Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

37 1 November 28 2 November 29 3 November 30 4 December 1 5 December 2 6 December 3 7 December 4

38 8 December 5 9 December 6 10 December 7 11 December 8 12 December 9 13 December 10 14 December 11

39 15 December 12 16 December 13 17 December 14 18 December 15 19 December 16 20 December 17 21 December 18

40 22 December 19 23 December 20 24 December 21 25 December 22 26 December 23 27 December 24 28 December 25

Gregorian year 2011 RAR Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

41 1 December 26 2 December 27 3 December 28 4 December 29 5 December 30 6 December 31 7 January 1

42 8 January 2 9 January 3 10 January 4 11 January 5 12 January 6 13 January 7 14 January 8

43 15 January 9 16 January 10 17 January 11 18 January 12 19 January 13 20 January 14 21 January 15

44 22 January 16 23 January 17 24 January 18 25 January 19 26 January 20 27 January 21 28 January 22

Gregorian year 2011 SAS Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

45 1 January 23 2 January 24 3 January 25 4 January 26 5 January 27 6 January 28 7 January 29

46 8 January 30 9 January 31 10 February 1 11 February 2 12 February 3 13 February 5 14 February 5

47 15 February 6 16 February 7 17 February 8 18 February 9 19 February 10 20 February 11 21 February 12

48 22 February 13 23 February 14 24 February 15 25 February 16 26 February 17 27 February 18 28 February 19

Gregorian year 2011 TAT Regular year 136

Week # Firstday Monday

Seconday Tuesday

Thirday Wednesday

Fourthday Thursday

Fifthday Friday

Sixthday Saturday

Seventhday Sunday

49 1 February 20 2 February 21 3 February 22 4 February 23 5 February 23 6 February 25 7 February 26

50 8 February 27 9 February 28 10 March 1 11 March 2 12 March 3 13 March 4 14 March 5

51 15 March 6 16 March 7 17 March 8 18 March 9 19 March 10 20 March 11 21 March 12

52 22 March 13 23 March 14 24 March 15 25 March 16 26 March 17 27 March 18 28 March 19

All graphics are of

Fractal images

Courtesy of

Thomas Boulvin