Module:Citation/CS1/Date validation/sandbox - Revision history

FlatLanguage: if we select this, double check is not needed

2025-05-25T16:19:02Z

if we select this, double check is not needed

FlatLanguage: or this

2025-05-25T10:28:35Z

or this

FlatLanguage: Help_talk:Citation_Style_1#3-digit_year_makes_error, Help_talk:Citation_Style_1#date:_2000-10-01,_year:_2010_doesn't_make_error

2025-05-25T09:21:20Z

Help_talk:Citation_Style_1#3-digit_year_makes_error, Help_talk:Citation_Style_1#date:_2000-10-01,_year:_2010_doesn't_make_error

Trappist the monk at 21:51, 17 May 2025

2025-05-17T21:51:50Z

← Previous revision		Revision as of 21:51, 17 May 2025
Line 821:		Line 821:
	end		end

	elseif mw.ustring.match(date_string, "%d%d%d%d[%-–]%d%d") then -- YYYY-YY date ranges		elseif mw.ustring.match(date_string, "^%d%d%d%d[%-–]%d%d$") then -- YYYY-YY date ranges; not to be confused with first part of YYYY-MM-DD
	local century;		local century;
	date1, century, date2 = mw.ustring.match(date_string, "((%d%d)%d%d)[%-–]+(%d%d)");		date1, century, date2 = mw.ustring.match(date_string, "((%d%d)%d%d)[%-–]+(%d%d)");

Trappist the monk at 19:10, 17 May 2025

2025-05-17T19:10:03Z

← Previous revision		Revision as of 19:10, 17 May 2025
Line 184:		Line 184:

	Special case for \|pmc-embargo-date=: years more than two years in the future are not acceptable		Special case for \|pmc-embargo-date=: years more than two years in the future are not acceptable

			This function also catches zero-padded years which are proscribed by MOS:BADDATE

	]]		]]

	local function is_valid_year (year, param)		local function is_valid_year (year, param)
			if mw.ustring.match (year, '^0') then -- first digit of <year> must not be zero
			return false;
			end

	if not is_set (year_limit) then		if not is_set (year_limit) then
	year_limit = tonumber(os.date("%Y"))+1; -- global variable so we only have to fetch it once		year_limit = tonumber(os.date("%Y"))+1; -- global variable so we only have to fetch it once

Remsense: Reverted 1 edit by 174.230.149.159 (talk) to last revision by Trappist the monk

2025-01-12T06:09:19Z

Reverted 1 edit by 174.230.149.159 (talk) to last revision by Trappist the monk

Show changes

174.230.149.159: ←Blanked the page

2025-01-12T06:04:12Z

←Blanked the page

Show changes

Trappist the monk: reset changes list;

2024-08-17T22:48:31Z

reset changes list;

← Previous revision		Revision as of 22:48, 17 August 2024
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	--[[		--[[
	History of changes since last sync: 2024-03-23		History of changes since last sync: 2024-08-17

	2024-07-12: maint cat for \|year= value more precise that a year; see Help_talk:Citation_Style_1#year_parameter

	]]		]]

Trappist the monk at 16:30, 12 July 2024

2024-07-12T16:30:43Z

← Previous revision		Revision as of 16:30, 12 July 2024
Line 1:		Line 1:
	--[[		--[[
	History of changes since last sync: 2024-03-23		History of changes since last sync: 2024-03-23

			2024-07-12: maint cat for \|year= value more precise that a year; see Help_talk:Citation_Style_1#year_parameter

	]]		]]

Trappist the monk at 13:26, 12 July 2024

2024-07-12T13:26:49Z

Show changes

← Previous revision		Revision as of 16:19, 25 May 2025
Line 583:		Line 583:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years
	if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later		if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
	if ~~(not is_valid_year(year)) or (~~not is_valid_year(year2)) then return false; end-- no year farther in the future than next year		if not is_valid_year(year2) then return false; end -- no year farther in the future than next year

	elseif mw.ustring.match(date_string, patterns_t['My-My'][1]) then -- month/season year - month/season year; separated by spaced endash		elseif mw.ustring.match(date_string, patterns_t['My-My'][1]) then -- month/season year - month/season year; separated by spaced endash
Line 589:		Line 589:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years
	if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same		if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
	if ~~(not is_valid_year(year)) or (~~not is_valid_year(year2)) then return false; end-- no year farther in the future than next year		if not is_valid_year(year2) then return false; end -- no year farther in the future than next year
	if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_valid_month_range_style(month, month2) then -- both must be month year, same month style		if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_valid_month_range_style(month, month2) then -- both must be month year, same month style
	month = get_month_number(month);		month = get_month_number(month);
Line 623:		Line 623:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor year from both years
	if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same		if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
	if ~~(not is_valid_year(year)) or (~~not is_valid_year(year2)) then return false; end-- no year farther in the future than next year		if not is_valid_year(year2) then return false; end -- no year farther in the future than next year

	elseif mw.ustring.match(date_string, patterns_t['y4-y2'][1]) then -- Year range: YYYY–YY; separated by unspaced endash		elseif mw.ustring.match(date_string, patterns_t['y4-y2'][1]) then -- Year range: YYYY–YY; separated by unspaced endash

← Previous revision		Revision as of 10:28, 25 May 2025
Line 188:		Line 188:

	Special case for \|pmc-embargo-date=: years more than two years in the future are not acceptable		Special case for \|pmc-embargo-date=: years more than two years in the future are not acceptable

	This function also catches zero-padded years which are proscribed by MOS:BADDATE

	]]		]]

	local function is_valid_year (year, param)		local function is_valid_year (year, param)
	if mw.ustring.match (year, '^0') then -- first digit of <year> must not be zero
	return false;
	end

	if not is_set (year_limit) then		if not is_set (year_limit) then
	year_limit = tonumber(os.date("%Y"))+1; -- global variable so we only have to fetch it once		year_limit = tonumber(os.date("%Y"))+1; -- global variable so we only have to fetch it once
Line 415:		Line 409:
	local patterns_t = {		local patterns_t = {
	-- year-initial numerical year-month-day		-- year-initial numerical year-month-day
	['ymd'] = {'^(%d%d%d%d)%-(%d%d)%-(%d%d)$', 'y', 'm', 'd'},		['ymd'] = {'^([1-9]%d%d%d)%-(%d%d)%-(%d%d)$', 'y', 'm', 'd'},
	-- month-initial: month day, year		-- month-initial: month day, year
	['Mdy'] = {'^(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'a', 'y'},		['Mdy'] = {'^(%D-) +([1-9]%d?), +(([1-9]%d%d%d?)%a?)$', 'm', 'd', 'a', 'y'},
	-- month-initial day range: month day–day, year; days are separated by endash		-- month-initial day range: month day–day, year; days are separated by endash
	['Md-dy'] = {'^(%D-) +([1-9]%d?)[%-–]([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'd2', 'a', 'y'},		['Md-dy'] = {'^(%D-) +([1-9]%d?)[%-–]([1-9]%d?), +(([1-9]%d%d%d?)%a?)$', 'm', 'd', 'd2', 'a', 'y'},
	-- day-initial: day month year		-- day-initial: day month year
	['dMy'] = {'^([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'a', 'y'},		['dMy'] = {'^([1-9]%d?) +(%D-) +(([1-9]%d%d%d?)%a?)$', 'd', 'm', 'a', 'y'},
	-- year-initial: year month day; day: 1 or 2 two digits, leading zero allowed; not supported at en.wiki		-- year-initial: year month day; day: 1 or 2 two digits, leading zero allowed; not supported at en.wiki
	-- ['yMd'] = {'^((%d%d%d%d?)%a?) +(%D-) +(%d%d?)$', 'a', 'y', 'm', 'd'},		-- ['yMd'] = {'^(([1-9]%d%d%d?)%a?) +(%D-) +(%d%d?)$', 'a', 'y', 'm', 'd'},
	-- day-range-initial: day–day month year; days are separated by endash		-- day-range-initial: day–day month year; days are separated by endash
	['d-dMy'] = {'^([1-9]%d?)[%-–]([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'd2', 'm', 'a', 'y'},		['d-dMy'] = {'^([1-9]%d?)[%-–]([1-9]%d?) +(%D-) +(([1-9]%d%d%d?)%a?)$', 'd', 'd2', 'm', 'a', 'y'},
	-- day initial month-day-range: day month - day month year; uses spaced endash		-- day initial month-day-range: day month - day month year; uses spaced endash
	['dM-dMy'] = {'^([1-9]%d?) +(%D-) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'd2', 'm2', 'a', 'y'},		['dM-dMy'] = {'^([1-9]%d?) +(%D-) +[%-–] +([1-9]%d?) +(%D-) +(([1-9]%d%d%d?)%a?)$', 'd', 'm', 'd2', 'm2', 'a', 'y'},
	-- month initial month-day-range: month day – month day, year; uses spaced endash		-- month initial month-day-range: month day – month day, year; uses spaced endash
	['Md-Mdy'] = {'^(%D-) +([1-9]%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$','m', 'd', 'm2', 'd2', 'a', 'y'},		['Md-Mdy'] = {'^(%D-) +([1-9]%d?) +[%-–] +(%D-) +([1-9]%d?), +(([1-9]%d%d%d?)%a?)$','m', 'd', 'm2', 'd2', 'a', 'y'},
	-- day initial month-day-year-range: day month year - day month year; uses spaced endash		-- day initial month-day-year-range: day month year - day month year; uses spaced endash
	['dMy-dMy'] = {'^([1-9]%d?) +(%D-) +(%d%d%d%d?) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'y', 'd2', 'm2', 'a', 'y2'},		['dMy-dMy'] = {'^([1-9]%d?) +(%D-) +([1-9]%d%d%d?) +[%-–] +([1-9]%d?) +(%D-) +(([1-9]%d%d%d?)%a?)$', 'd', 'm', 'y', 'd2', 'm2', 'a', 'y2'},
	-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash		-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash
	['Mdy-Mdy'] = {'^(%D-) +([1-9]%d?), +(%d%d%d%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'y', 'm2', 'd2', 'a', 'y2'},		['Mdy-Mdy'] = {'^(%D-) +([1-9]%d?), +([1-9]%d%d%d?) +[%-–] +(%D-) +([1-9]%d?), +(([1-9]%d%d%d?)%a?)$', 'm', 'd', 'y', 'm2', 'd2', 'a', 'y2'},

	-- these date formats cannot be converted, per se, but month name can be rendered short or long		-- these date formats cannot be converted, per se, but month name can be rendered short or long
	-- month/season year - month/season year; separated by spaced endash		-- month/season year - month/season year; separated by spaced endash
	['My-My'] = {'^(%D-) +(%d%d%d%d?) +[%-–] +(%D-) +((%d%d%d%d?)%a?)$', 'm', 'y', 'm2', 'a', 'y2'},		['My-My'] = {'^(%D-) +([1-9]%d%d%d?) +[%-–] +(%D-) +(([1-9]%d%d%d?)%a?)$', 'm', 'y', 'm2', 'a', 'y2'},
	-- month/season range year; months separated by endash		-- month/season range year; months separated by endash
	['M-My'] = {'^(%D-)[%-–](%D-) +((%d%d%d%d?)%a?)$', 'm', 'm2', 'a', 'y'},		['M-My'] = {'^(%D-)[%-–](%D-) +(([1-9]%d%d%d?)%a?)$', 'm', 'm2', 'a', 'y'},
	-- month/season year or proper-name year; quarter year when First Quarter YYYY etc.		-- month/season year or proper-name year; quarter year when First Quarter YYYY etc.
	['My'] = {'^([^%d–]-) +((%d%d%d%d?)%a?)$', 'm', 'a', 'y'}, -- this way because endash is a member of %D; %D- will match January–March 2019 when it shouldn't		['My'] = {'^([^%d–]-) +(([1-9]%d%d%d?)%a?)$', 'm', 'a', 'y'}, -- this way because endash is a member of %D; %D- will match January–March 2019 when it shouldn't

	-- these date formats cannot be converted		-- these date formats cannot be converted
	['Sy4-y2'] = {'^(%D-) +((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash		['Sy4-y2'] = {'^(%D-) +(([1-9]%d)%d%d)[%-–]((%d%d)%a?)$'}, -- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
	['Sy-y'] = {'^(%D-) +(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'}, -- special case Winter/Summer year-year; year separated with unspaced endash		['Sy-y'] = {'^(%D-) +([1-9]%d%d%d?)[%-–](([1-9]%d%d%d?)%a?)$'}, -- special case Winter/Summer year-year; year separated with unspaced endash
	['y-y'] = {'^(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'}, -- year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999		['y-y'] = {'^([1-9]%d%d%d?)[%-–](([1-9]%d%d%d?)%a?)$'}, -- year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999
	['y4-y2'] = {'^((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- year range: YYYY–YY; separated by unspaced endash		['y4-y2'] = {'^(([1-9]%d)%d%d)[%-–]((%d%d)%a?)$'}, -- year range: YYYY–YY; separated by unspaced endash
	['y'] = {'^((%d%d%d%d?)%a?)$'}, -- year; here accept either YYY or YYYY		['y'] = {'^(([1-9]%d%d%d?)%a?)$'}, -- year; here accept either YYY or YYYY
	}		}

← Previous revision		Revision as of 09:21, 25 May 2025
Line 1:		Line 1:
	--[[		--[[
	History of changes since last sync: 2024-08-17		History of changes since last sync: 2024-08-17

			2025-05-25: make \|date=Jan 0500, \|date=0999–1000, \|date=090–100 error, accept \|date=Jan 500.

			2025-05-25: make \|date=2000-10-01\|year=2010 error


Line 415:		Line 419:
	['Mdy'] = {'^(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'a', 'y'},		['Mdy'] = {'^(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'a', 'y'},
	-- month-initial day range: month day–day, year; days are separated by endash		-- month-initial day range: month day–day, year; days are separated by endash
	['Md-dy'] = {'^(%D-) +([1-9]%d?)[%-–]([1-9]%d?), +((%d%d%d%d)%a?)$', 'm', 'd', 'd2', 'a', 'y'},		['Md-dy'] = {'^(%D-) +([1-9]%d?)[%-–]([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'd2', 'a', 'y'},
	-- day-initial: day month year		-- day-initial: day month year
	['dMy'] = {'^([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'a', 'y'},		['dMy'] = {'^([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'a', 'y'},
Line 421:		Line 425:
	-- ['yMd'] = {'^((%d%d%d%d?)%a?) +(%D-) +(%d%d?)$', 'a', 'y', 'm', 'd'},		-- ['yMd'] = {'^((%d%d%d%d?)%a?) +(%D-) +(%d%d?)$', 'a', 'y', 'm', 'd'},
	-- day-range-initial: day–day month year; days are separated by endash		-- day-range-initial: day–day month year; days are separated by endash
	['d-dMy'] = {'^([1-9]%d?)[%-–]([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$', 'd', 'd2', 'm', 'a', 'y'},		['d-dMy'] = {'^([1-9]%d?)[%-–]([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'd2', 'm', 'a', 'y'},
	-- day initial month-day-range: day month - day month year; uses spaced endash		-- day initial month-day-range: day month - day month year; uses spaced endash
	['dM-dMy'] = {'^([1-9]%d?) +(%D-) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$', 'd', 'm', 'd2', 'm2', 'a', 'y'},		['dM-dMy'] = {'^([1-9]%d?) +(%D-) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'd2', 'm2', 'a', 'y'},
	-- month initial month-day-range: month day – month day, year; uses spaced endash		-- month initial month-day-range: month day – month day, year; uses spaced endash
	['Md-Mdy'] = {'^(%D-) +([1-9]%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d)%a?)$','m', 'd', 'm2', 'd2', 'a', 'y'},		['Md-Mdy'] = {'^(%D-) +([1-9]%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$','m', 'd', 'm2', 'd2', 'a', 'y'},
	-- day initial month-day-year-range: day month year - day month year; uses spaced endash		-- day initial month-day-year-range: day month year - day month year; uses spaced endash
	['dMy-dMy'] = {'^([1-9]%d?) +(%D-) +(%d%d%d%d) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d)%a?)$', 'd', 'm', 'y', 'd2', 'm2', 'a', 'y2'},		['dMy-dMy'] = {'^([1-9]%d?) +(%D-) +(%d%d%d%d?) +[%-–] +([1-9]%d?) +(%D-) +((%d%d%d%d?)%a?)$', 'd', 'm', 'y', 'd2', 'm2', 'a', 'y2'},
	-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash		-- month initial month-day-year-range: month day, year – month day, year; uses spaced endash
	['Mdy-Mdy'] = {'^(%D-) +([1-9]%d?), +(%d%d%d%d) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d)%a?)$', 'm', 'd', 'y', 'm2', 'd2', 'a', 'y2'},		['Mdy-Mdy'] = {'^(%D-) +([1-9]%d?), +(%d%d%d%d?) +[%-–] +(%D-) +([1-9]%d?), +((%d%d%d%d?)%a?)$', 'm', 'd', 'y', 'm2', 'd2', 'a', 'y2'},

	-- these date formats cannot be converted, per se, but month name can be rendered short or long		-- these date formats cannot be converted, per se, but month name can be rendered short or long
	-- month/season year - month/season year; separated by spaced endash		-- month/season year - month/season year; separated by spaced endash
	['My-My'] = {'^(%D-) +(%d%d%d%d) +[%-–] +(%D-) +((%d%d%d%d)%a?)$', 'm', 'y', 'm2', 'a', 'y2'},		['My-My'] = {'^(%D-) +(%d%d%d%d?) +[%-–] +(%D-) +((%d%d%d%d?)%a?)$', 'm', 'y', 'm2', 'a', 'y2'},
	-- month/season range year; months separated by endash		-- month/season range year; months separated by endash
	['M-My'] = {'^(%D-)[%-–](%D-) +((%d%d%d%d)%a?)$', 'm', 'm2', 'a', 'y'},		['M-My'] = {'^(%D-)[%-–](%D-) +((%d%d%d%d?)%a?)$', 'm', 'm2', 'a', 'y'},
	-- month/season year or proper-name year; quarter year when First Quarter YYYY etc.		-- month/season year or proper-name year; quarter year when First Quarter YYYY etc.
	['My'] = {'^([^%d–]-) +((%d%d%d%d)%a?)$', 'm', 'a', 'y'}, -- this way because endash is a member of %D; %D- will match January–March 2019 when it shouldn't		['My'] = {'^([^%d–]-) +((%d%d%d%d?)%a?)$', 'm', 'a', 'y'}, -- this way because endash is a member of %D; %D- will match January–March 2019 when it shouldn't

	-- these date formats cannot be converted		-- these date formats cannot be converted
	['Sy4-y2'] = {'^(%D-) +((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash		['Sy4-y2'] = {'^(%D-) +((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- special case Winter/Summer year-year (YYYY-YY); year separated with unspaced endash
	['Sy-y'] = {'^(%D-) +(%d%d%d%d)[%-–]((%d%d%d%d)%a?)$'}, -- special case Winter/Summer year-year; year separated with unspaced endash		['Sy-y'] = {'^(%D-) +(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'}, -- special case Winter/Summer year-year; year separated with unspaced endash
	['y-y'] = {'^(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'}, -- year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999		['y-y'] = {'^(%d%d%d%d?)[%-–]((%d%d%d%d?)%a?)$'}, -- year range: YYY-YYY or YYY-YYYY or YYYY–YYYY; separated by unspaced endash; 100-9999
	['y4-y2'] = {'^((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- year range: YYYY–YY; separated by unspaced endash		['y4-y2'] = {'^((%d%d)%d%d)[%-–]((%d%d)%a?)$'}, -- year range: YYYY–YY; separated by unspaced endash
Line 585:		Line 589:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years
	if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later		if 1 ~= tonumber(year2) - tonumber(year) then return false; end -- must be sequential years, left to right, earlier to later
	if not is_valid_year(year2) then return false; end -- no year farther in the future than next year		if (not is_valid_year(year)) or (not is_valid_year(year2)) then return false; end-- no year farther in the future than next year

	elseif mw.ustring.match(date_string, patterns_t['My-My'][1]) then -- month/season year - month/season year; separated by spaced endash		elseif mw.ustring.match(date_string, patterns_t['My-My'][1]) then -- month/season year - month/season year; separated by spaced endash
Line 591:		Line 595:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor_year from both years
	if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same		if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
	if not is_valid_year(year2) then return false; end -- no year farther in the future than next year		if (not is_valid_year(year)) or (not is_valid_year(year2)) then return false; end-- no year farther in the future than next year
	if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_valid_month_range_style(month, month2) then -- both must be month year, same month style		if 0 ~= get_month_number(month) and 0 ~= get_month_number(month2) and is_valid_month_range_style(month, month2) then -- both must be month year, same month style
	month = get_month_number(month);		month = get_month_number(month);
Line 625:		Line 629:
	anchor_year = year .. '–' .. anchor_year; -- assemble anchor year from both years		anchor_year = year .. '–' .. anchor_year; -- assemble anchor year from both years
	if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same		if tonumber(year) >= tonumber(year2) then return false; end -- left to right, earlier to later, not the same
	if not is_valid_year(year2) then return false; end -- no year farther in the future than next year		if (not is_valid_year(year)) or (not is_valid_year(year2)) then return false; end-- no year farther in the future than next year

	elseif mw.ustring.match(date_string, patterns_t['y4-y2'][1]) then -- Year range: YYYY–YY; separated by unspaced endash		elseif mw.ustring.match(date_string, patterns_t['y4-y2'][1]) then -- Year range: YYYY–YY; separated by unspaced endash
Line 806:		Line 810:
	year = year_string:match ('(%d%d%d%d?)');		year = year_string:match ('(%d%d%d%d?)');

	if date_string:match ('%d%d%d%d%-%d%d%-%d%d~~') and year_string:match ('%d%d%d%d%a~~') then --special case where both date and year are required YYYY-MM-DD and YYYYx		if date_string:match ('%d%d%d%d%-%d%d%-%d%d') then --special case where both date and year are required YYYY-MM-DD and YYYYx
	date1 = date_string:match ('(%d%d%d%d)');		date1 = date_string:match ('(%d%d%d%d)');
	year = year_string:match ('(%d%d%d%d)');		year = year_string:match ('(%d%d%d%d)');
	if year ~= date1 then		if year ~= date1 then
	result = 0; -- years don't match		result = 0; -- years don't match
			elseif year_string:match ('%d%d%d%d%a') then
	else
	result = 2; -- years match; but because disambiguated, don't add to maint cat		result = 2; -- years match; but because disambiguated, don't add to maint cat
	end		end
Line 821:		Line 825:
	end		end

	elseif mw.ustring.match(date_string, "^%d%d%d%d[%-–]%d%d$") then -- YYYY-YY date ranges~~; not to be confused with first part of YYYY-MM-DD~~		elseif mw.ustring.match(date_string, "%d%d%d%d[%-–]%d%d") then -- YYYY-YY date ranges
	local century;		local century;
	date1, century, date2 = mw.ustring.match(date_string, "((%d%d)%d%d)[%-–]+(%d%d)");		date1, century, date2 = mw.ustring.match(date_string, "((%d%d)%d%d)[%-–]+(%d%d)");