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In the Fixed Festivity Day Calendar, the twelve months all have exactly 4 weeks that start on Monday. Before every week there may be a single-day Holiday that is not part of the week cycle. Overall there are 30 Holidays, which includes the leap day, i.e. there are only 29 that occur in common years.

There are 10 Holidays per any 4 consecutive months, which make a hexad of 16 weeks, hence 122 days, with 80 work days (Mon–Fri) therein. A Holiday always occurs before even weeks and before (the first week of) odd months.

Weekday numbering (D)
0 1 2 3 4 5 6 7
Holiday Monday Tuesday Wednesday Thursday Friday Saturday Sunday
Hol Mon Tue Wed Thu Fri Sat Sun

The date format is MM-W-D and does not conflict with existing ISO 8601 formats, although it may clash with supersets thereof, e.g. some defined in the International Calendar. Weeks and months start their count at 1, days at 0 (Holiday) or 1 (Monday). The week count is reset every month. Ordinal weeks of the year, running through 48, are called octavs (‘O’) for short. In a leap year, an octav contains exactly 7.625 days on average, whereas it’s about 7.604 days in common years, together it’s about 7.6092 days (depending on the leap rule).

Seasons (i.e. quarters, ‘S’) and hexads (‘X’) also start at 1, but are not part of the formal date count. The holidays in the table (of civil or Christian tradition) are just suggestions, others may be moved accordingly or can be celebrated on Sundays.

The Gregorian dates 1 and 2 March have different FFC equivalents in leap years, because the FFC leap day is ordinal day 062 instead of 060.

Fixed Festivity Day Calendar
Season Hexad Month Holiday Octav Gregorian equivalent
S1
North Winter
South Summer
X1 X3+ X3* X3# 01
January
New Year / Circumcision O01 01 02 03 04 05 06 07 08
Epiphany / Baptism O02 09 10 11 12 13 14 15 16
O03 17 18 19 20 21 22 23
Candlemas / Equality O04 24 25 26 27 28 29 30 31
X1+ 02
February
O05 01 02 03 04 05 06 07
Valentine / Groundhog O06 08 09 10 11 12 13 14 15
O07 16 17 18 19 20 21 22
Shrove / Lent O08 23 24 25 26 27 28 29 01
X1* 03
March
Leap O09 02 03 04 05 06 07 08 09
Spring / Lady / Annunciation O10 10 11 12 13 14 15 16 17
O11 18 19 20 21 22 23 24
Good / Holy / Maundy O12 25 26 27 28 29 30 31 01
S2
North Spring
South Fall
X1# 04
April
O13 02 03 04 05 06 07 08
Easter / Pascha O14 09 10 11 12 13 14 15 16
O15 17 18 19 20 21 22 23
Father / Men O16 24 25 26 27 28 29 30 01
X2 05
May
Labor / Remembrance O17 02 03 04 05 06 07 08 09
Mother / Women O18 10 11 12 13 14 15 16 17
O19 18 19 20 21 22 23 24
Ascension / Parents O20 25 26 27 28 29 30 31 01
X2+ 06
June
O21 02 03 04 05 06 07 08
Pentecost / Elders / Ancestors O22 09 10 11 12 13 14 15 16
O23 17 18 19 20 21 22 23
Corpus Christi / Family O24 24 25 26 27 28 29 30 01
S3
North Summer
South Winter
X2* 07
July
Midsummer O25 02 03 04 05 06 07 08 09
Nation: Independence / Unification / Foundation / Liberation O26 10 11 12 13 14 15 16 17
O27 18 19 20 21 22 23 24
World / Unity O28 25 26 27 28 29 30 31 01
X2# 08
August
O29 02 03 04 05 06 07 08
Assumption / Metamorphosis / Transfiguration O30 09 10 11 12 13 14 15 16
O31 17 18 19 20 21 22 23
Freedom / Liberty O32 24 25 26 27 28 29 30 31
X3 09
September
Children / School / Education / Student O33 01 02 03 04 05 06 07 08
Ruler / Region / Inauguration / Cross O34 09 10 11 12 13 14 15 16
O35 17 18 19 20 21 22 23
Peace / Rest O36 24 25 26 27 28 29 30 01
S4
North Fall
South Spring
X3+ 10
October
O37 02 03 04 05 06 07 08
Thanksgiving / Harvest O38 09 10 11 12 13 14 15 16
O39 17 18 19 20 21 22 23
Community / Civic / Continent O40 24 25 26 27 28 29 30 31
X3* 11
November
Saints / Hallows / Prayer / Reformation O41 01 02 03 04 05 06 07 08
Carnival / Joy O42 09 10 11 12 13 14 15 16
O43 17 18 19 20 21 22 23
Dead / Souls / Memorial / Veterans O44 24 25 26 27 28 29 30 01
X3# 12
December
O45 02 03 04 05 06 07 08
Advent / Nicholas O46 09 10 11 12 13 14 15 16
O47 17 18 19 20 21 22 23
Christmas / Midwinter / Kwanzaa / Chanukka O48 24 25 26 27 28 29 30 31
Nominal Work Time (with holidays, without vacation and sickness)
Work week type Work days
per year
Work hours per day
6-hour shift 7-hour shift 8-hour shift 9-hour shift
FFC 5-day 240 30 35 40 45 per week
120 140 160 180 per month
1440 1680 1920 2160 per year
FFC 6-day 288 36 42 48 54 per week
144 168 192 216 per month
1728 2016 2304 2592 per year
Gregorian 5-day,
approximates
255 30 35 40 45 per week
130 152 174 196 per month
1560 1785 2040 2295 per year
235 1440 1645 1880 2115 per year with 20 days off
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