Module:Year in various calendars

-- Load dependencies. local getArgs = require('Module:Arguments').getArgs local numToRoman = require( 'Module:Roman' ).main local getOlympiad = require( 'Module:Ancient Olympiads' )._main local getDynasty = require( 'Module:Ancient Egypt era' )._main local getPharaoh = require( 'Module:Ancient Egypt kings' )._main local numToArmenian = require( 'Module:Armenian' ).main local getRegnal = require( 'Module:British regnal year' ).main local japaneseEra = require( 'Module:Japanese calendar' ).era

-- Define constants. local lang = mw.language.getContentLanguage local currentYear = tonumber( lang:formatDate( 'Y' ) )

-- Helper functions

local function isInteger( num ) -- Checks if a value is an integer. If so, returns the value converted to a number. -- If not, returns false. num = tonumber( num ) if num and math.floor( num ) == num and num ~= math.huge then return num else return false end end

local function BCToNum( s ) -- Converts strings of the format "n BC" to their corresponding -- numerical values. if type( s ) ~= 'string' then return nil end s = mw.ustring.match( mw.ustring.upper( s ), '^([1-9]%d*)%s*BC$' ) if not s then return nil end local num = tonumber( s ) num = ( num - 1 ) * -1 return num end

local function numToBC( num ) -- For BC years, returns a string with the year name appended with " BC". -- Otherwise returns nil. num = isInteger( num ) if not num then return end if num <= 0 then return string.format( '%d BC', 1 - num ) end end

local function ADToNum( s ) -- Converts strings of the format "AD n" -- to their corresponding numerical values. if type( s ) ~= 'string' then return nil end s = mw.ustring.match( mw.ustring.upper( s ), '^AD%s*([1-9]%d*)$' ) if not s then return nil end local num = tonumber( s ) return num end

local function numToAD( num ) -- For AD years up to 100, returns a string with the year name prepended with "AD ". -- Otherwise returns nil. num = isInteger( num ) if not num then return end if (num <= 100) then return string.format( 'AD %d', num ) end end

local function formatNegative(s) -- Replaces hyphens in a string with minus signs if the hyphen comes before a number. s = mw.ustring.gsub( s, '%-(%d)', '−%1' ) return s end

-- Calendar box class definition

local calendarBox = {} calendarBox.__index = calendarBox

function calendarBox:new( init ) init = type( init ) == 'table' and init or {} local obj = {} local pagename = mw.title.getCurrentTitle.text

-- Set the year. If the year is specified as an argument, use that. -- Otherwise, use the page name if it is valid. If the pagename isn't	-- valid, use the current year. local yearNum = isInteger( init.year ) local yearBC = BCToNum( init.year ) local yearAD = ADToNum( init.year ) local pageNum = isInteger( pagename ) local pageBC = BCToNum( pagename ) local pageAD = ADToNum( pagename ) if yearNum then -- First, see if the year parameter is a number. self.year = yearNum elseif yearBC then -- Second, see if the year parameter is a "yyyy BC" string. self.year = yearBC elseif yearAD then -- Third, see if the year parameter is an AD/CE/year string. self.year = yearAD elseif pageNum then -- Fourth, see if the pagename is an integer. self.year = pageNum elseif pageBC then -- Fifth, see if the pagename is a "yyyy BC" string. self.year = pageBC elseif pageAD then -- Sixth, see if the pagename is an AD/CE/year string. self.year = pageAD else self.year = currentYear -- If none of the above apply, use the current year. end

-- Set year text values. self.BCYearName = numToBC( self.year ) self.ADYearName = numToAD( self.year ) if self.BCYearName then self.yearText = self.BCYearName elseif self.ADYearName then self.yearText = self.ADYearName else self.yearText = tostring( self.year ) end

-- Set other fields. self.caption = self.yearText self.footnotes = init.footnotes

return setmetatable( obj, {			__index = self		}) end

function calendarBox:setCaption( s ) -- Sets the calendar box caption. if type( s ) ~= 'string' or s == '' then return end self.caption = s end

function calendarBox:addCalendar( obj ) -- Adds a calendar or a calendar group. if type( obj ) ~= 'table' and type( obj.new ) ~= 'function' then return end -- Exit if the object is invalid. self.calendars = self.calendars or {} table.insert( self.calendars, obj ) end

-- Add an alias for adding calendar groups. The function is the same, but it might be confusing for users -- to have to use the name "addCalendar" for a calendar group. calendarBox.addCalendarGroup = calendarBox.addCalendar

function calendarBox:export -- Outputs the calendar box wikitext. local root = mw.html.create( 'table' ) -- Export the calendar box headers. root :addClass( 'infobox vevent' ) :css( 'width', '22em' ) :tag( 'caption' ) :css( 'font-size', '125%' ) :tag( 'span' ) :addClass( 'summary dtstart' ) :wikitext( self.caption )

-- Export the calendars and calendar groups. "calendar:export" works for both kinds -- of objects. Some export functions can return nil, so we need to check for that. if type( self.calendars ) == 'table' then for _, calendar in ipairs( self.calendars ) do			local calendarText = calendar:export if type( calendarText ) == 'string' then root:wikitext( calendarText ) end end end

-- Add footnotes. if type( self.footnotes ) == 'string' and self.footnotes ~= '' then root :tag( 'tr' ) :tag( 'td' ) :attr( 'colspan', '2' ) :wikitext( string.format( ' %s ', self.footnotes ) ) end

return tostring( root ) end

-- Calendar group class definition

-- Calendar groups are used to group different calendars together. -- Previously, the template did this by including a table row with -- no year value. By using objects we can do the same thing more -- semantically.

local calendarGroup = {} calendarGroup.__index = calendarGroup

function calendarGroup:new( init ) init = type( init ) == 'table' and init or {} local obj = {}

-- Get the heading and throw an error if it is invalid. obj.heading = init.heading if type( obj.heading ) ~= 'string' then error( 'calendarGroup: no heading detected' ) end

-- Set the metatable and return the object. self.__index = self return setmetatable( obj, {			__index = self		}) end

function calendarGroup:addCalendar( calendar ) -- Adds a calendar object to the calendar group. self.calendars = self.calendars or {} if type( calendar ) == 'table' and type( calendar.getLink ) == 'function' then table.insert( self.calendars, calendar ) end end

function calendarGroup:export -- Exports the calendar group's wikitext. -- Indent and italicise each calendar's link if it exists. for i, calendar in ipairs( self.calendars ) do		local link = calendar:getLink if type( link ) == 'string' then self.calendars[ i ]:setRawLink( string.format( " - %s", link ) ) end end -- Create the heading row html and export the calendar objects. local ret = mw.html.create ret :tag( 'tr' ) :tag( 'td' ) :wikitext( self.heading ) :done :tag( 'td' ) -- Use a blank tag to make the html look nice. :allDone for _, calendar in ipairs( self.calendars ) do		ret:wikitext( calendar:export ) end return tostring( ret ) end

-- Calendar class definition

local calendar = {} calendar.__index = calendar calendar.type = 'calendar'

function calendar:new local obj = {} return setmetatable( obj, {			__index = self		}) end

function calendar:setLink( link, display ) -- Sets the calendar's wikilink, with optional display text and italics. if type( link ) ~= 'string' or link == '' then return end display = type( display ) == 'string' and display ~= '' and display if display then self.link = string.format( '%s', link, display ) else self.link = string.format( '%s', link ) end end

function calendar:setRawLink( s ) -- Sets the calendar's wikilink as raw wikitext. if type( s ) ~= 'string' or s == '' then return end self.link = s end

function calendar:getLink -- Returns the calendar's link value. return self.link end

function calendar:setYear( year ) -- Sets a single year. Can be passed either a string or a number. -- If passed as a number, it is formatted with minus signs instead of hyphens. -- If passed as a string, no minus-sign formatting occurs; this should be done in the individual calendar definitions. if type( year ) == 'number' then year = tostring( year ) self.year = formatNegative( year ) elseif type( year ) == 'string' then self.year = year end end

function calendar:setYearRange( year1, year2 ) -- Sets a year range. Must be passed two numbers. if type( year1 ) == 'number' and type( year2 ) == 'number' then local year if year1 < 0 or year2 < 0 then -- Leave a gap for negative years to avoid having a minus sign and a dash right next to each other. year = string.format( '%d – %d', year1, year2 ) year = formatNegative( year ) else year = string.format( '%d–%d', year1, year2 ) end self.year = year end end

function calendar:setYearCouple( year1, year2 ) -- Same as setYearRange, only with a slash (/) in the middle. Must be passed two numbers. -- Additional text possible, must be defined as follows: addtext = string.format( 'additional text or link') -- See example in Seleucid era calendar if type( year1 ) == 'number' and type( year2 ) == 'number' then local year if year1 < 0 or year2 < 0 then -- Leave no gap for negative years. year = string.format( '%d/%d %s', year1, year2, addtext ) year = formatNegative( year ) else year = string.format( '%d/%d %s', year1, year2, addtext ) end self.year = year end end

function calendar:export -- Outputs the calendar wikitext. -- Exit if no link has been specified. local link = self.link if type( link ) ~= 'string' or link == '' then return end

-- If no year has been specified, set the year value to N/A. local year = self.year if type( year ) ~= 'string' or year == '' then year = "N/A" end

-- Build the table row. local ret = mw.html.create ret :tag( 'tr' ) :tag( 'td' ) :wikitext( link ) :done :tag( 'td' ) :wikitext( year ) :allDone return tostring( ret ) end

-- Build the box

local function makeCalendarBox( args ) -- Initiate the box and get the year values. local init = args local box = calendarBox:new( init ) local year = box.year local yearText = box.yearText

-- Set the caption. box:setCaption( box.caption .. ' in various calendars' )

--	-- Gregorian calendar --

local gregorian = calendar:new gregorian:setLink( 'Gregorian calendar' ) -- Get the year link. local gregcal = args.gregcal if type( gregcal ) == 'string' and gregcal ~= '' then gregorian.yearLink = string.format( '%s', gregcal, yearText ) else gregorian.yearLink = yearText end -- Set the year. gregorian.romanYear = numToRoman{ math.abs(year) } .. (year < 0 and ' BC' or '') if gregorian.romanYear then gregorian:setYear( string.format( %s %s , gregorian.yearLink, gregorian.romanYear ) )	else gregorian:setYear( gregorian.yearLink ) end box:addCalendar( gregorian ) --	-- French Republican calendar -- displays only in years 1793 - 1805 and 1871 -- This calendar was in use and had defined years only for the short period on display. -- Its importance during these few years is also the reason why it should stay out of the alphabetic order. -- See discussion on talk page. --	if year >= 1793 and year < 1806 or year == 1871 then local republican = calendar:new republican:setLink('French Republican calendar') if year <= 1870 then republican:setYearRange( year - 1792, year - 1791 ) elseif year == 1871 then republican:setYear( year - 1792 ) -- Paris Commune, May end box:addCalendar( republican ) end --	-- Ab urbe condita -- Varro's correlation, from 1 AUC --	if year >= -752 then local abUrbe = calendar:new abUrbe:setLink( 'Ab urbe condita' ) abUrbe:setYear( year + 753 ) box:addCalendar( abUrbe ) end --	-- Ancient Egypt era -- Displays dynasty between 1549 BC and 30 BC	-- Displays pharaoh or king between 752 BC and 30 BC	-- if year > -1549 and year <= -29 then local ancEgypt = calendar:new ancEgypt:setLink(			'Egyptian chronology',			'Ancient Egypt era'		) ancEgypt:setYear( getDynasty( year ) ) box:addCalendar( ancEgypt ) end if year > - 752 and year <= -29 then local ancPharaoh = calendar:new ancPharaoh:setLink(			'List of pharaohs',			- Pharaoh		) ancPharaoh:setYear( getPharaoh( year ) ) box:addCalendar( ancPharaoh ) end

--	-- Ancient Olympiads -- Currently only the first 194 Olympiads -- May be expanded until 394 AD when data available --	if year >= -1300 and year < 1 then local ancOlympiads = calendar:new ancOlympiads:setLink(			'Ancient Greek calendar',			'Ancient Greek era'		) ancOlympiads:setYear( getOlympiad( year ) ) box:addCalendar( ancOlympiads ) end

--	-- Armenian calendar --

if year > 551 then local armenian = calendar:new armenian:setLink( 'Armenian calendar' ) local armenianYear = year - 551 armenian:setYear( string.format( '%s ԹՎ %s', armenianYear, numToArmenian( armenianYear ) ) ) box:addCalendar( armenian ) end

--	-- Assyrian calendar --

local assyrian = calendar:new assyrian:setLink( 'Assyrian calendar' ) assyrian:setYear( year + 4750 ) box:addCalendar( assyrian )

--	-- Bahá'í calendar -- displays only after 1843 --	if year >= 1844 then local bahai = calendar:new bahai:setLink( "Baháʼí calendar" ) bahai:setYearRange( year - 1844, year - 1843 ) box:addCalendar( bahai ) end --   -- Balinese saka calendar --    local balinese = calendar:new balinese:setLink( 'Balinese saka calendar' ) if year - 76 > 0 then balinese:setYearRange( year - 79, year - 78 ) end box:addCalendar( balinese )

--	-- Bengali calendar --

local bengali = calendar:new bengali:setLink( 'Bengali calendar' ) bengali:setYear( year - 593 ) box:addCalendar( bengali )

--	-- Berber calendar --

local berber = calendar:new berber:setLink( 'Berber calendar' ) berber:setYear( year + 950 ) box:addCalendar( berber )

--	-- Regnal year --

if year >= 1000 then local regnal = calendar:new local regnalName if year > 1706 then regnalName = 'British' else regnalName = 'English' end regnal:setLink( 'Regnal years of English monarchs', regnalName .. ' Regnal year' ) regnal:setYear( getRegnal( year ) ) box:addCalendar( regnal ) end

--	-- Buddhist calendar --

local buddhist = calendar:new buddhist:setLink( 'Buddhist calendar' ) buddhist:setYear( year + 544 ) box:addCalendar( buddhist )

--	-- Burmese calendar --

local burmese = calendar:new burmese:setLink( 'Burmese calendar' ) burmese:setYear( year - 638 ) box:addCalendar( burmese )

--	-- Byzantine calendar --

local byzantine = calendar:new byzantine:setLink( 'Byzantine calendar' ) byzantine:setYearRange( year + 5508, year + 5509 ) box:addCalendar( byzantine )

--	-- Chinese calendar --

local chinese = calendar:new chinese:setLink( 'Chinese calendar' )

-- Define the information for the "heavenly stems" and "earthly branches" year cycles. -- See Chinese calendar for information.

local heavenlyStems = { { '甲', 'Wood' },  -- 1 { '乙', 'Wood' },  -- 2 { '丙', 'Fire' },  -- 3 { '丁', 'Fire' },  -- 4 { '戊', 'Earth' }, -- 5 { '己', 'Earth' }, -- 6 { '庚', 'Metal' }, -- 7 { '辛', 'Metal' }, -- 8 { '壬', 'Water' }, -- 9 { '癸', 'Water' }  -- 10 }

local earthlyBranches = { { '子', 'Rat' },          -- 1 { '丑', 'Ox' },            -- 2 { '寅', 'Tiger' },      -- 3 { '卯', 'Rabbit' },    -- 4 { '辰', 'Dragon' },    -- 5 { '巳', 'Snake' },      -- 6 { '午', 'Horse' },      -- 7 { '未', 'Goat' },        -- 8 { '申', 'Monkey' },    -- 9 { '酉', 'Rooster' },  -- 10 { '戌', 'Dog' },          -- 11 { '亥', 'Pig' }           -- 12 }

-- Calculate the cycle numbers from the year. The first sexagenary year corresponds to the previous year's entry -- in Chinese calendar correspondence table, as the Chinese New Year doesn't happen until Jan/Feb in -- Gregorian years. local sexagenaryYear1 = ( year - 4 ) % 60 local sexagenaryYear2 = ( year - 3 ) % 60 local heavenlyNum1 = (sexagenaryYear1 - 1) % 10 + 1 -- amod, since lua arrays are 1-indexed local heavenlyNum2 = (sexagenaryYear2 - 1) % 10 + 1 local earthlyNum1 = (sexagenaryYear1 - 1) % 12 + 1 local earthlyNum2 = (sexagenaryYear2 - 1) % 12 + 1

-- Get the data tables for each permutation. local heavenlyTable1 = heavenlyStems[ heavenlyNum1 ] local heavenlyTable2 = heavenlyStems[ heavenlyNum2 ] local earthlyTable1 = earthlyBranches[ earthlyNum1 ] local earthlyTable2 = earthlyBranches[ earthlyNum2 ]

-- Work out the continously-numbered year. (See Chinese calendar.) local year1 = year + 2696 local year2 = year + 2697 local year1Alt = year1 - 60 local year2Alt = year2 - 60

-- Format any negative numbers. year1 = formatNegative( tostring( year1 ) ) year2 = formatNegative( tostring( year2 ) ) year1Alt = formatNegative( tostring( year1Alt ) ) year2Alt = formatNegative( tostring( year2Alt ) )

-- Return all of that data in a (hopefully) reader-friendly format. chinese:setYear( string.format( [=%s%s年 (%s %s) %s or %s — to — %s%s年 (%s %s) %s or %s]=], heavenlyTable1[ 1 ], earthlyTable1[ 1 ], heavenlyTable1[ 2 ], earthlyTable1[ 2 ], year1, year1Alt, heavenlyTable2[ 1 ], earthlyTable2[ 1 ], heavenlyTable2[ 2 ], earthlyTable2[ 2 ], year2, year2Alt ) )

box:addCalendar( chinese )

--	-- Coptic calendar --

local coptic = calendar:new coptic:setLink( 'Coptic calendar' ) coptic:setYearRange( year - 284, year - 283 ) box:addCalendar( coptic )

--	-- Discordian calendar --

local discordian = calendar:new discordian:setLink( 'Discordian calendar' ) discordian:setYear( year + 1166 ) box:addCalendar( discordian )

--	-- Ethiopian calendar --

local ethiopian = calendar:new ethiopian:setLink( 'Ethiopian calendar' ) ethiopian:setYearRange( year - 8, year - 7 ) box:addCalendar( ethiopian )

--	-- Hebrew calendar --

local hebrew = calendar:new hebrew:setLink( 'Hebrew calendar' ) hebrew:setYearRange( year + 3760, year + 3761 ) box:addCalendar( hebrew )

--	-- Hindu calendars --

local hindu = calendarGroup:new{ heading = 'Hindu calendars' }

-- Vikram Samvat

local vikramSamvat = calendar:new vikramSamvat:setLink( 'Vikram Samvat' ) vikramSamvat:setYearRange( year + 56, year + 57 ) hindu:addCalendar( vikramSamvat )

-- Shaka Samvat

local shakaSamvat = calendar:new shakaSamvat:setLink( 'Indian national calendar', 'Shaka Samvat' ) if year >= 78 then shakaSamvat:setYearRange( year - 79, year - 78 ) end hindu:addCalendar( shakaSamvat )

-- Kali Yuga

local kaliYuga = calendar:new kaliYuga:setLink( 'Kali Yuga' ) -- use italics kaliYuga:setYearRange( year + 3100, year + 3101 ) hindu:addCalendar( kaliYuga )

box:addCalendarGroup( hindu )

--	-- Holocene calendar --

local holocene = calendar:new holocene:setLink( 'Holocene calendar' ) holocene:setYear( year + 10000 ) box:addCalendar( holocene )

--	-- Igbo calendar --

-- In the old template this was a calendar group with just one calendar; intentionally adding this as a single -- calendar here, as the previous behaviour looked like a mistake. if year >= 1000 then local igbo = calendar:new igbo:setLink( 'Igbo calendar' ) igbo:setYearRange( year - 1000, year - 999 ) box:addCalendar( igbo ) end

--	-- Iranian calendar --

local iranian = calendar:new iranian:setLink( 'Iranian calendars', 'Iranian calendar' ) if year - 621 > 0 then iranian:setYearRange( year - 622, year - 621 ) else iranian:setYear( string.format( '%d BP – %d BP', 622 - year, 621 - year ) ) end box:addCalendar( iranian )

--	-- Islamic calendar --

local islamic = calendar:new islamic:setLink( 'Islamic calendar' ) local islamicMult = 1.030684 -- the factor to multiply by	local islamicSub = 621.5643 -- the factor to subtract by	if year - 621 > 0 then local year1 = math.floor( islamicMult * ( year - islamicSub ) ) local year2 = math.floor( islamicMult * ( year - islamicSub + 1 ) ) islamic:setYearRange( year1, year2 ) else local year1 = math.ceil( -islamicMult * ( year - islamicSub ) ) local year2 = math.ceil( -islamicMult * ( year - islamicSub + 1 ) ) islamic:setYear( string.format( '%d BH – %d BH', year1, year2 ) ) end box:addCalendar( islamic )

--	-- Japanese calendar -- starting 600 --	if year >= 600 then local japanese = calendar:new japanese:setLink( 'Japanese calendar' )

japanese.thisEra = japaneseEra:new{ year = year } if japanese.thisEra then local japaneseYearText = {} japanese.oldEra = japanese.thisEra:getOldEra if japanese.oldEra and japanese.oldEra.eraYear and japanese.thisEra.article ~= japanese.oldEra.article then japanese.oldText = string.format( '%s %d', japanese.oldEra.link, japanese.oldEra.eraYear ) table.insert( japaneseYearText, japanese.oldText ) table.insert( japaneseYearText, ' / ' ) end if japanese.thisEra.eraYear then table.insert( japaneseYearText, string.format( '%s %d', japanese.thisEra.link, japanese.thisEra.eraYear ) ) end table.insert( japaneseYearText, string.format( ' (%s%s年) ', japanese.thisEra.kanji, japanese.thisEra.eraYearKanji ) ) japanese:setYear( table.concat( japaneseYearText ) ) end

box:addCalendar( japanese ) end

--	-- Javanese calendar --

local javanese = calendar:new javanese:setLink( 'Javanese calendar' ) local javaneseMult = 1.030684 -- the factor to multiply by	local javaneseSub = 124.9 -- the factor to subtract by	if year - 124 > 0 then local year1 = math.floor( javaneseMult * ( year - javaneseSub ) ) local year2 = math.floor( javaneseMult * ( year - javaneseSub + 1 ) ) javanese:setYearRange( year1, year2 ) else local year1 = math.ceil( -javaneseMult * ( year - javaneseSub ) ) local year2 = math.ceil( -javaneseMult * ( year - javaneseSub + 1 ) ) end box:addCalendar( javanese ) --	-- Juche calendar -- displays only after 1910 --

if year >= 1910 then local juche = calendar:new juche:setLink( 'Juche calendar' ) if year > 1911 then juche:setYear( year - 1911 ) end box:addCalendar( juche ) end

--	-- Julian calendar --

local julian = calendar:new julian:setLink( 'Julian calendar' )

if year >= -45 and year < 1582 then julian:setYear(gregorian.year) elseif year >= 1582 then local diff = math.floor(year/100-2) - math.floor(year/400) if year % 100 == 0 and year % 400 ~= 0 then julian:setYear('Gregorian minus ' .. diff-1 .. ' or ' .. diff .. ' days') else julian:setYear('Gregorian minus ' .. diff .. ' days') end end

box:addCalendar( julian )

--	-- Korean calendar --

local korean = calendar:new korean:setLink( 'Korean calendar' ) korean:setYear( year + 2333 ) box:addCalendar( korean )

--	-- Minguo calendar --

local minguo = calendar:new minguo:setLink( 'Minguo calendar' ) if year > 1949 then local minguoYear = year - 1911 minguo:setYear( string.format( 'ROC %d 民國%d年 ', minguoYear, minguoYear ) ) elseif year > 1911 then local minguoYear = year - 1911 minguo:setYear( string.format( 'ROC %d 民國%d年 ', minguoYear, minguoYear ) ) else local minguoYear = 1911 - year + 1 minguo:setYear( string.format( '%d before ROC 民前%d年 ', minguoYear, minguoYear ) ) end box:addCalendar( minguo ) --	-- Nanakshahi calendar --

local nanakshahi = calendar:new nanakshahi:setLink( 'Nanakshahi calendar' ) nanakshahi:setYear( year - 1468 ) box:addCalendar( nanakshahi ) --	-- Seleucid era -- displays from 312 BC until 1200 AD	-- if year >= -311 and year < 1200 then local seleucid = calendar:new seleucid:setLink( 'Seleucid era' ) addtext = string.format( 'AG') seleucid:setYearCouple( year + 311, year + 312, addtext ) box:addCalendar( seleucid ) end

--	-- Thai solar calendar --

local thai = calendar:new thai:setLink( 'Thai solar calendar' ) if year >= 1941 then thai:setYear( year + 543 ) else -- if year >= 1912 or year <= 1887 -- year started in March/April thai:setYearRange( year + 542, year + 543 ) -- else -- Rattanakosin Era, 1888?-1912 --			thai:setYear( string.format( '%d – %d (Rattanakosin Era) ', year - 1782, year - 1781 ) ) end box:addCalendar( thai )

--	-- Tibetan calendar --

local tibetan = calendar:new tibetan:setLink( 'Tibetan calendar' )

-- Define the information for the "heavenly stems" and "earthly branches" year cycles. -- See Tibetan calendar for information.

local heavenlyStems = { { '阳木', 'male Wood' },  -- 1 { '阴木', 'female Wood' },  -- 2 { '阳火', 'male Fire' },  -- 3 { '阴火', 'female Fire' },  -- 4 { '阳土', 'male Earth' }, -- 5 { '阴土', 'female Earth' }, -- 6 { '阳金', 'male Iron' }, -- 7 { '阴金', 'female Iron' }, -- 8 { '阳水', 'male Water' }, -- 9 { '阴水', 'female Water' }  -- 10 }

local earthlyBranches = { { '鼠', 'Rat' },          -- 1 { '牛', 'Ox' },            -- 2 { '虎', 'Tiger' },      -- 3 { '兔', 'Rabbit' },    -- 4 { '龙', 'Dragon' },    -- 5 { '蛇', 'Snake' },      -- 6 { '马', 'Horse' },      -- 7 { '羊', 'Goat' },        -- 8 { '猴', 'Monkey' },    -- 9 { '鸡', 'Rooster' },  -- 10 { '狗', 'Dog' },          -- 11 { '猪', 'Pig' }           -- 12 }

-- Calculate the cycle numbers from the year. The first sexagenary year corresponds to the previous year's entry -- in Tibetan calendar correspondence table, as the Tibetan New Year doesn't happen until Feb/Mar in -- Gregorian years. local sexagenaryYear1 = ( year - 4 ) % 60 local sexagenaryYear2 = ( year - 3 ) % 60 local heavenlyNum1 = (sexagenaryYear1 - 1) % 10 + 1 -- amod, since lua arrays are 1-indexed local heavenlyNum2 = (sexagenaryYear2 - 1) % 10 + 1 local earthlyNum1 = (sexagenaryYear1 - 1) % 12 + 1 local earthlyNum2 = (sexagenaryYear2 - 1) % 12 + 1

-- Get the data tables for each permutation. local heavenlyTable1 = heavenlyStems[ heavenlyNum1 ] local heavenlyTable2 = heavenlyStems[ heavenlyNum2 ] local earthlyTable1 = earthlyBranches[ earthlyNum1 ] local earthlyTable2 = earthlyBranches[ earthlyNum2 ]

-- Work out the continously-numbered year. (See Tibetan calendar.) local year1 = year + 126 local year2 = year + 127 local year1Alt1 = year1 - 381 local year1Alt2 = year1 - 1153 local year2Alt1 = year2 - 381 local year2Alt2 = year2 - 1153

-- Format any negative numbers. year1 = formatNegative( tostring( year1 ) ) year2 = formatNegative( tostring( year2 ) ) year1Alt1 = formatNegative( tostring( year1Alt1 ) ) year1Alt2 = formatNegative( tostring( year1Alt2 ) ) year2Alt1 = formatNegative( tostring( year2Alt1 ) ) year2Alt2 = formatNegative( tostring( year2Alt2 ) )

-- Return all of that data in a (hopefully) reader-friendly format. tibetan:setYear( string.format( [=[%s%s年 (%s-%s) %s or %s or %s — to — %s%s年 (%s-%s) %s or %s or %s]=], heavenlyTable1[ 1 ], earthlyTable1[ 1 ], heavenlyTable1[ 2 ], earthlyTable1[ 2 ], year1, year1Alt1, year1Alt2, heavenlyTable2[ 1 ], earthlyTable2[ 1 ], heavenlyTable2[ 2 ], earthlyTable2[ 2 ], year2, year2Alt1, year2Alt2 ) )

box:addCalendar( tibetan )

--	-- Unix time --

local unix = calendar:new

local function getUnixTime( year ) if year < 1970 then return end local noError, unixTime = pcall( lang.formatDate, lang, 'U', '1 Jan ' .. tostring( year ) ) if not noError or noError and not unixTime then return end unixTime = tonumber( unixTime ) if unixTime and unixTime >= 0 then return unixTime - 1 end end unix.thisYear = getUnixTime( year ) unix.nextYear = getUnixTime( year + 1 ) if unix.thisYear and unix.nextYear then unix:setLink( 'Unix time' ) unix:setYear( (unix.thisYear + 1) .. " – " .. unix.nextYear ) end

box:addCalendar( unix )

return box:export end

-- Process arguments from #invoke

local p = {}

function p.main( frame ) -- Process the arguments and pass them to the box-building function. local args = getArgs( frame ) -- Pass year argument with 'year' parameter or without any name but first argument args.year = args.year or args[1] return makeCalendarBox( args ) end

return p