# Icelandic holiday definitions for the Ruby Holiday gem.
#
# Updated: 2008-11-29.
# Sources:
# - http://www.simnet.is/gardarj/folk/days.htm#days
# - http://www.iceland.is/history-and-culture/Traditions/IcelandicHolidays/
# - http://en.wikipedia.org/wiki/Public_holidays_in_Iceland
# - http://www.qppstudio.net/publicholidays2007/iceland.htm
--- 
months:
  0: 
  - name: Bolludagur
    regions: [is]
    function: easter(year)-48
  - name: Sprengidagur
    regions: [is]
    function: easter(year)-47
  - name: Öskudagur
    regions: [is]
    function: easter(year)-46
  - name: Pálmasunnudagur
    regions: [is]
    function: easter(year)-7
  - name: Skírdagur
    regions: [is]
    function: easter(year)-3
  - name: Föstudaginn langi
    regions: [is]
    function: easter(year)-2
  - name: Páskadagur
    regions: [is]
    function: easter(year)
  - name: Annar í páskum
    regions: [is]
    function: easter(year)+1
  - name: Uppstigningardagur
    regions: [is]
    function: easter(year)+39
  - name: Hvítasunnudagur
    regions: [is]
    function: easter(year)+49
  - name: Annar í hvítasunnu
    regions: [is]
    function: easter(year)+50
  1: 
  - name: Nýársdagur
    regions: [is]
    mday: 1
  - name: Þrettándinn
    regions: [is]
    mday: 6
  - name: Bóndadagur
    regions: [is]
    mday: 19
    type: informal
  2:
  - name: Konudagur
    regions: [is]
    mday: 18
    type: informal  
  4:
  - name: Sumardagurinn fyrsti
    regions: [is]
    function: is_sumardagurinn_fyrsti(year)
  5:
  - name: Verkalýðsdagurinn
    regions: [is]
    mday: 1
  - name: Mæðradagurinn
    regions: [is]
    mday: 13
  6:
  - name: Sjómannadagurinn
    regions: [is]
    mday: 3
    type: informal
  - name: Lýðveldisdagurinn
    regions: [is]
    mday: 17
  8:
  - name: Frídagur verslunarmanna
    regions: [is]
    week: 1
    wday: 1
  11:
  - name: Dagur íslenskrar tungu
    regions: [is]
    mday: 16
  12:
  - name: Jól
    regions: [is]
    mday: 24
  - name: Jól
    regions: [is]
    mday: 25
  - name: Jól
    regions: [is]
    mday: 26
  - name: Gamlárskvöld
    regions: [is]
    mday: 31
methods:
  is_sumardagurinn_fyrsti: |
    # Iceland: first day of summer (Thursday after 18 April)
    def self.is_sumardagurinn_fyrsti(year)
      date = Date.civil(year,4,18)
      if date.wday < 4
        date += (4 - date.wday)
      else date
        date += (11 - date.wday)
      end
      date
    end
tests: |
    {Date.civil(2007,1,1) => 'Nýársdagur', 
     Date.civil(2007,1,6) => 'Þrettándinn',
     Date.civil(2007,1,19) => 'Bóndadagur',
     Date.civil(2007,2,18) => 'Konudagur',
     Date.civil(2007,4,5) => 'Skírdagur',
     Date.civil(2007,4,6) => 'Föstudaginn langi',
     Date.civil(2007,4,8) => 'Páskadagur',
     Date.civil(2007,4,9) => 'Annar í páskum',
     Date.civil(2007,4,19) => 'Sumardagurinn fyrsti',
     Date.civil(2007,5,1) => 'Verkalýðsdagurinn',
     Date.civil(2007,5,17) => 'Uppstigningardagur',
     Date.civil(2007,5,27) => 'Hvítasunnudagur',
     Date.civil(2007,5,28) => 'Annar í hvítasunnu',
     Date.civil(2007,6,3) => 'Sjómannadagurinn',
     Date.civil(2007,6,17) => 'Lýðveldisdagurinn',
     Date.civil(2007,8,6) => 'Frídagur verslunarmanna',
     Date.civil(2007,12,24) => 'Jól',
     Date.civil(2007,12,25) => 'Jól',
     Date.civil(2007,12,26) => 'Jól',
     Date.civil(2007,12,31) => 'Gamlárskvöld'}.each do |date, name|
      assert_equal name, (Holidays.on(date, :is, :informal)[0] || {})[:name]
    end