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'''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.
  
'''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 ±YYYY-M-W-D.
 +
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"
  
{| class="wikitable"
Line 32: Line 32:
 
| || (Holiweek) ||
  
| || (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"
  
{| class="wikitable"
Line 48: Line 54:
 
|colspan=8| Sunmonth†
  
|colspan=8| Sunmonth†
 
|-
  
|-
  +
! [[Octalendar]]
⚫
! [[Symmetry454 Calendar|4:5:4]]
  
−
|colspan=4| January
 +
|colspan=7| ''month 1''
−
|colspan=5| February
 +
|colspan=6| ''month 2''
−
|colspan=4| March
 +
|colspan=7| ''month 3''
−
|colspan=4| April
 +
|colspan=6| ''month 4''
−
|colspan=5| May
 +
|colspan=7| ''month 5''
−
|colspan=4| June
 +
|colspan=6| ''month 6''
−
|colspan=4| July
 +
|colspan=7| ''month 7''
−
|colspan=5| August
 +
|colspan=7| ''month 8''†
⚫
|colspan=4| September
  
⚫
|colspan=4| October
  
⚫
|colspan=5| November
  
⚫
|colspan=5| December†
  
 
|-
  
|-
 
! [[Bonavian Civil Calendar|5:4:4]]
  
! [[Bonavian Civil Calendar|5:4:4]]
−
|colspan=5| January
 +
| colspan="5" | January
−
|colspan=4| February
 +
| 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="5" | February
 
|colspan=4| March
  
|colspan=4| March
−
|colspan=5| April
 +
| colspan="4" | April
−
|colspan=4| May
 +
| colspan="5" | May
 
|colspan=4| June
  
|colspan=4| June
−
|colspan=5| July
 +
| colspan="4" | July
−
|colspan=4| August
 +
| colspan="5" | August
 
|colspan=4| September
  
|colspan=4| September
−
|colspan=5| October
 +
| colspan="4" | October
−
|colspan=4| November
 +
| colspan="5" | November
 
|colspan=5| December†
  
|colspan=5| December†
 
|-
  
|-
Line 105: Line 121:
 
|colspan=5| December†
  
|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="22" | Summer semester
  ⚫
| colspan="8" | Summer break
  ⚫
| colspan="15" | Winter semester
  +
|-
  ⚫
| colspan="15" | ''Epiphany/Hilary'' trimester
  ⚫
| colspan="23" | ''Trinity'' trimester with summer break
  ⚫
| colspan="15" | ''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.
  +
<!--
  +
Plough Monday, Monday after Epiphany -1-1-8
  +
-->
  +
  +
{| class="wikitable"
  +
|+Fixed (Christian) holidays
  +
|-
  +
! Holiday !! Date !! Notes
  +
|-
  +
! {{WPlink|New Year}}
  ⚫
| -1-1-1 || the first day of Monmonth
  +
|-
  ⚫
! {{WPlink|Circumcision of Christ}}
  ⚫
| -1-1-1 || the first day of Monmonth
  +
|-
  +
! {{WPlink|Epiphany}}
  +
| -1-1-7 || was 6 Jan or Sunday close by, also ''Theophany''
  +
|-
  ⚫
! {{WPlink|Candlemas}}
  +
| -1-4-7 || was 2 Feb or Sunday close to it, ''Presentation of Jesus at the Temple''
  +
|-
  ⚫
! {{WPlink|Valentine’s Day}}
  +
| -1-6-7 || was 14 Feb
  +
|-
  ⚫
! {{WPlink|Shrove Monday}}
  ⚫
| -2-1-1
  +
| the first day of Tuesmonth, 7 weeks before Easter
  +
! rowspan="3" | {{WPlink|Carnival}}
  +
|-
  ⚫
! {{WPlink|Mardi Gras}}
  ⚫
| -2-1-2 ||
  +
|-
  ⚫
! {{WPlink|Ash Wednesday}}
  ⚫
| -2-1-3 ||
  +
|-
  +
! {{WPlink|Women’s Day}}
  +
| -2-2-7 ||was 8 Mar
  +
|-
  +
! {{WPlink|Lady Day}}
  +
| -2-3-7 || was 25 Mar, ''Feast of the Annunciation of the Blessed Virgin''
  +
|-
  ⚫
! {{WPlink|Maundy Thursday}}
  ⚫
| -2-7-4
  +
|
  +
! rowspan="4" | {{WPlink|Easter}}
  +
|-
  ⚫
! {{WPlink|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
  +
|-
  ⚫
! {{WPlink|Labor Day}}
  +
| -3-3-3 || -3-3-1? -3-7-5?, ''Workers’ Day'' was 1 May (or 1st Mon in Sep in NA)
  +
|-
  +
! {{WPlink|Mother’s Day}}
  +
| -3-3-7 || was 2nd Sun in May etc.pp.
  +
|-
  ⚫
! {{WPlink|Father’s Day}}
  +
| -3-4-7 || was 3rd Sun in Jun etc.pp.
  +
|-
  ⚫
! {{WPlink|Ascension}}
  +
| -3-7-4 ||40 days after Easter
  +
! rowspan="3" | {{WPlink|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''
  +
|-
  +
! {{WPlink|Trinity Sunday}}
  ⚫
| -4-1-7 ||
  +
|-
  ⚫
! {{WPlink|Corpus Christi}}
  +
| -4-2-4 ||60 days after Easter
  +
|-
  +
! {{WPlink|Midsummer}}
  +
| -4-2-7 || was ca. 21 Jun
  +
|-
  +
! {{WPlink|Feast of the Transfiguration}}
  ⚫
| -4-7-7 || the last day of Thursmonth, was 6 Aug
  +
|-
  ⚫
! {{WPlink|Feast of the Cross}}
  ⚫
| -5-8-7 || the last day of Frimonth, was 14 Sep
  +
|-
  +
! {{WPlink|Michaelmas}}
  +
| -6-1-7 || was 29 Sep, ''Feast of the Archangels''
  +
|-
  ⚫
! {{WPlink|Halloween}}
  ⚫
| -6-6-6
  +
| a Saturday, was 31 Oct, ''Samhain''
  ⚫
! rowspan="2" | All Hallows
  +
|-
  +
! {{WPlink|All Hallows}}
  +
| -6-6-7 || was 1 Nov
  +
|-
  ⚫
! {{WPlink|All Saints}}
  ⚫
| -6-7-7 || the last day of Saturmonth
  +
|-
  ⚫
! {{WPlink|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 ||
  +
! rowspan="5" | {{WPlink|Advent}}
  +
|-
  +
! {{WPlink|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 ||
  +
! rowspan="3" | {{WPlink|Christmas}}
  +
|-
  +
! Christmas Day
  +
| -7-6-7 || was 25 Dec
 
|-
  
|-
  ⚫
! {{WPlink|Boxing Day}}
⚫
|colspan=8| Winter semester
  
  +
| -7-7-1 || was 26 Dec
⚫
|colspan=22| Summer semester
  
⚫
|colspan=8| Summer break
  
⚫
|colspan=15| Winter semester
  
 
|-
  
|-
  +
! New Year’s Eve
⚫
|colspan=15| ''Epiphany/Hilary'' trimester
  
  +
| -7-7/8-7 || depends on leap week
⚫
|colspan=23| ''Trinity'' trimester with summer break
  
⚫
|colspan=15| ''Michaelmas'' trimester
  
 
|}
  
|}
   
−
== Fixed (Christian) holidays==
 +
=== See also ===
  +
* [[Octalendar]] is similar, but has 8 months of 6 or 7 weeks.
−
;New Year
  
  +
* Some [[Academic Calendar]]s also have 7-week or 8-week intervals.
⚫
;Epiphany/Circumcision of Christ
  
⚫
: -1-1-1, the first day of Monmonth
  
⚫
; Candlemas
  
⚫
: -1-4-7
  
⚫
; Valentine’s Day
  
⚫
: -1-6-7
  
⚫
; Shrove Monday
  
⚫
: -2-1-1, the first day of Tuesmonth
  
⚫
; Mardi Gras
  
⚫
: -2-1-2
  
⚫
; Ash Wednesday
  
⚫
: -2-1-3
  
⚫
; Maundy Thursday
  
⚫
: -2-7-4
  
⚫
; 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?, instead of -05-01)
  
−
; Mothers Day
  
⚫
: -3-3-7
  
⚫
; Father’s Day
  
−
: -3-4-7
  
⚫
; Ascension
  
⚫
: -3-7-4
  
⚫
; Pentecost
  
⚫
: -3-8-7, the last day of Wednesmonth
  
⚫
; Pentecost Monday
  
⚫
: -4-1-1, the first day of Thursmonth
  
−
; Trinity
  
⚫
: -4-1-7
  
⚫
; Corpus Christi
  
−
: -4-2-4
  
−
; Transfiguration
  
⚫
: -4-7-7, the last day of Thursmonth
  
⚫
; Feast of the Cross
  
⚫
: -5-8-7, the last day of Frimonth
  
⚫
; Halloween
  
−
: -6-6-6, a Saturday
  
⚫
; All Hallows
  
⚫
: -6-6-7
  
⚫
; All Saints
  
⚫
: -6-7-7, the last day of Saturmonth
  
⚫
; Thanksgiving
  
⚫
: -7-1-7
  
⚫
; Christmas Day
  
⚫
: -7-6-7
  
⚫
; Boxing Day
  
−
: -7-7-1
  
 
[[Category:Leap Week Calendars]]
  
[[Category:Leap Week Calendars]]
 
[[Category:Proposed calendars]]
  
[[Category:Proposed calendars]]
Line 180: Line 285:
 
[[Category:7-day week]]
  
[[Category:7-day week]]
 
[[Category:Week starts Monday]]
  
[[Category:Week starts Monday]]
  +
[[Category:Holidays]]

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 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
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 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

See also

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