Changes: Cal7

Revision as of 15:08, 3 January 2019

Cal7 is a proposed leap week calendar that heavily relies on the number seven. A week has, as usual, 7 days, but also a month has 7 weeks and a year has 7 months. The only deviation are odd-numbered months, which have 8 weeks, except for the last one where the eighth week is the leap week. A leap week occurs every 7th year and every 29th year (the rest of the leap rule is yet to be defined). Cal7 can thus be considered a loose solar calendar.

The ISO 8601-like date format is ±CCYY-M-W-D. If not specified otherwise, Cal7 agrees with this international standard, e.g. that Monday is the first day of the week.

English names
Ordinal	Day	Week	Month
1	Monday	Monweek	Monmonth*
2	Tuesday	Tuesweek	Tuesmonth
3	Wednesday	Wednesweek	Wednesmonth*
4	Thursday	Thursweek	Thursmonth
5	Friday	Friweek	Frimonth*
6	Saturday	Saturweek	Saturmonth
7	Sunday	Sunweek	Sunmonth†
8		(Holiweek)

In the table, an asterisk * denotes months that always include Holiweek and a dagger † shows the month that is 8 weeks long only in leap years.

Comparison

The following table compares Cal7 with similar proposals, assuming weeks start on Monday in all cases. The academic terms listed are synchronized with Cal7 months; they could be aligned with other months instead.

Relation to other leap week calendars
Week	01	05	06	08	09	10	13	14	16	17	18	19	21	22	23	24	25	27	29	31	32	33	34	35	36	37	39	40	41	44	45	46	47	48	49
Cal7	Monmonth				Tuesmonth				Wednesmonth							Thursmonth				Frimonth							Saturmonth					Sunmonth†
Octalendar	month 1			month 2				month 3					month 4					month 5					month 6					month 7					month 8†
5:4:4	January		February			March		April				May			June			July			August				September			October			November				December†
4:5:4	January	February				March		April			May				June			July		August					September			October		November					December†
4:4:5	January	February			March			April			May			June				July		August				September				October		November				December†
13mon	January	February			March		April			May			June				X		July			August				September			October		November				December†
Academic (example)	Spring semester															Summer break				Fall semester
	Winter semester				Summer semester															Summer break							Winter semester
	Epiphany/Hilary trimester								Trinity trimester with summer break																		Michaelmas trimester

Holidays

The Christian holidays are fixed as follows: Carnival, Easter and Pentecost are at month boundaries, 7 weeks apart. Christmas Eve is one week before New Year’s Eve unless there’s a leap week and Lady Day is 40 weeks before Christmas (not 9 months).

Note that Halloween is on -6-6-6, a Saturday. Most holidays are conveniently placed onto Sundays, unless they are already associated with a fixed day of the week.

Fixed (Christian) holidays
Holiday	Date	Notes
New Year	-1-1-1	the first day of Monmonth
Circumcision of Christ	-1-1-1	the first day of Monmonth
Epiphany	-1-1-7	was 6 Jan or Sunday close by, also Theophany
Candlemas	-1-4-7	was 2 Feb or Sunday close to it, Presentation of Jesus at the Temple
Valentine’s Day	-1-6-7	was 14 Feb
Shrove Monday	-2-1-1	the first day of Tuesmonth, 7 weeks before Easter	Carnival
Mardi Gras	-2-1-2
Ash Wednesday	-2-1-3
Women’s Day	-2-2-7	was 8 Mar
Lady Day	-2-3-7	was 25 Mar, Feast of the Annunciation of the Blessed Virgin
Maundy Thursday	-2-7-4		Easter
Good Friday	-2-7-5
Easter Sunday	-2-7-7	the last day of Tuesmonth (a week later than proposed for Sym454)
Easter Monday	-3-1-1	the first day of Wednesmonth
Labor Day	-3-3-3	-3-3-1? -3-7-5?, Workers’ Day was 1 May (or 1st Mon in Sep in NA)
Mother’s Day	-3-3-7	was 2nd Sun in May etc.pp.
Father’s Day	-3-4-7	was 3rd Sun in Jun etc.pp.
Ascension	-3-7-4	40 days after Easter	Pentecost
Pentecost Sunday	-3-8-7	the last day of Wednesmonth, 7 weeks after Easter
Pentecost Monday	-4-1-1	the first day of Thursmonth, Our Lady of Holy Church
Trinity Sunday	-4-1-7
Corpus Christi	-4-2-4	60 days after Easter
Midsummer	-4-2-7	was ca. 21 Jun
Feast of the Transfiguration	-4-7-7	the last day of Thursmonth, was 6 Aug
Feast of the Cross	-5-8-7	the last day of Frimonth, was 14 Sep
Michaelmas	-6-1-7	was 29 Sep, Feast of the Archangels
Halloween	-6-6-6	a Saturday, was 31 Oct, Samhain	All Hallows
All Hallows	-6-6-7	was 1 Nov	All Hallows
All Saints	-6-7-7	the last day of Saturmonth
Thanksgiving	-7-1-7	Harvest feast, was 4th Thu in Nov, 2nd Mon in Oct, 1st Sun in Oct etc.pp.
1st Advent Sunday	-7-2-7		Advent
St. Nicklas	-7-3-6	was 6 Dec
2nd Advent Sunday	-7-3-7
3rd Advent Sunday	-7-4-7
4th Advent Sunday	-7-5-7
Christmas Eve	-7-6-6		Christmas
Christmas Day	-7-6-7	was 25 Dec
Boxing Day	-7-7-1	was 26 Dec
New Year’s Eve	-7-7/8-7	depends on leap week

@@ Line 1: / Line 1: @@
 '''Cal7''' is a proposed leap week calendar that heavily relies on the number seven. A week has, as usual, 7 days, but also a month has 7 weeks and a year has 7 months. The only deviation are odd-numbered months, which have 8 weeks, except for the last one where the eighth week is the leap week. A leap week occurs every 7th year and every 29th year (the rest of the leap rule is yet to be defined). Cal7 can thus be considered a loose solar calendar.
-The [[ISO 8601]]-like date format is <code>±CCYY-M-W-D</code>.
+The [[ISO 8601]]-like date format is <code>±CCYY-M-W-D</code>. If not specified otherwise, Cal7 agrees with this international standard, e.g. that Monday is the first day of the week.
 {| class="wikitable"
@@ Line 32: / Line 32: @@
 | || (Holiweek) ||
 |}
+In the table, an asterisk * denotes months that always include Holiweek and a dagger † shows the month that is 8 weeks long only in leap years.
+==Comparison==
+The following table compares Cal7 with similar proposals, assuming weeks start on Monday in all cases. The academic terms listed are synchronized with Cal7 months; they could be aligned with other months instead.
 {| class="wikitable"
@@ Line 48: / Line 54: @@
 |colspan=8| Sunmonth†
 |-
-! Octalendar
+! [[Octalendar]]
 |colspan=7| ''month 1''
 |colspan=6| ''month 2''
 |colspan=7| ''month 3''
 |colspan=6| ''month 4''
 |colspan=7| ''month 5''
 |colspan=6| ''month 6''
 |colspan=7| ''month 7''
 |colspan=7| ''month 8''†
+|-
+! [[Bonavian Civil Calendar|5:4:4]]
+| colspan="5" | January
+| colspan="4" | February
+| colspan="4" | March
+| colspan="5" | April
+| colspan="4" | May
+| colspan="4" | June
+| colspan="5" | July
+| colspan="4" | August
+| colspan="4" | September
+| colspan="5" | October
+| colspan="4" | November
+| colspan="5" | December†
 |-
 ! [[Symmetry454 Calendar|4:5:4]]
-|colspan=4| January
+| colspan="4" | January
-|colspan=5| February
+| colspan="5" | February
 |colspan=4| March
-|colspan=4| April
+| colspan="4" | April
-|colspan=5| May
+| colspan="5" | May
 |colspan=4| June
-|colspan=4| July
+| colspan="4" | July
-|colspan=5| August
+| colspan="5" | August
 |colspan=4| September
-|colspan=4| October
+| colspan="4" | October
-|colspan=5| November
+| colspan="5" | November
-|colspan=5| December†
-|-
-! [[Bonavian Civil Calendar|5:4:4]]
-|colspan=5| January
-|colspan=4| February
-|colspan=4| March
-|colspan=5| April
-|colspan=4| May
-|colspan=4| June
-|colspan=5| July
-|colspan=4| August
-|colspan=4| September
-|colspan=5| October
-|colspan=4| November
 |colspan=5| December†
 |-
@@ Line 115: / Line 121: @@
 |colspan=5| December†
 |-
-!rowspan=3| [[Academic Calendar|Academic]]
+! rowspan="3" | [[Academic Calendar|Academic]] (example)
-|colspan=23| Spring semester
+| colspan="23" | Spring semester
-|colspan=7| Summer break
+| colspan="7" | Summer break
-|colspan=23| Fall semester
+| colspan="23" | Fall semester
 |-
-|colspan=8| Winter semester
+| colspan="8" | Winter semester
-|colspan=22| Summer semester
+| colspan="22" | Summer semester
-|colspan=8| Summer break
+| colspan="8" | Summer break
-|colspan=15| Winter semester
+| colspan="15" | Winter semester
 |-
-|colspan=15| ''Epiphany/Hilary'' trimester
+| colspan="15" | ''Epiphany/Hilary'' trimester
-|colspan=23| ''Trinity'' trimester with summer break
+| colspan="23" | ''Trinity'' trimester with summer break
-|colspan=15| ''Michaelmas'' trimester
+| colspan="15" | ''Michaelmas'' trimester
 |}
@@ Line 133: / Line 139: @@
 The Christian holidays are fixed as follows: Carnival, Easter and Pentecost are at month boundaries, 7 weeks apart. Christmas Eve is one week before New Year’s Eve unless there’s a leap week and Lady Day is 40 weeks before Christmas (not 9 months).
-Note that Halloween is on -6-6-6, a Saturday. Most holidays are conveniently placed onto Sundays, unless they are already associated with a fixed day of the week.<!--
+Note that Halloween is on -6-6-6, a Saturday. Most holidays are conveniently placed onto Sundays, unless they are already associated with a fixed day of the week.
+<!--
 Plough Monday, Monday after Epiphany -1-1-8
 -->
 {| class="wikitable"
 |+Fixed (Christian) holidays
@@ Line 270: / Line 278: @@
 === See also ===
 * [[Octalendar]] is similar, but has 8 months of 6 or 7 weeks.
-* Some [[Academic Calendar|Academic Calendars]] also have 7-week or 8-week intervals.
+* Some [[Academic Calendar]]s also have 7-week or 8-week intervals.
 [[Category:Leap Week Calendars]]
 [[Category:Proposed calendars]]