-- \/ | ___ __| |_ _| | ___ _|_ _/ |( _ ) _ __ / /_| | __ _| |_ ___
| |\/| |/ _ \ / _` | | | | |/ _ (_)| || |/ _ \| '_ \ / / _` |/ _` | __/ _ \
| | | | (_) | (_| | |_| | | __/_ | || | (_) | | | |/ / (_| | (_| | || __/
|_| |_|\___/ \__,_|\__,_|_|\___(_)___|_|\___/|_| |_/_/ \__,_|\__,_|\__\___|  
This Module handles per language customization of dates
Copied from https://commons.wikimedia.org/wiki/Module:I18n/date
used by Module:ISOdate, Module:Complex date, Module:WikidataIB
Authors and Maintainers:
- Jarekt  
local p = {}  
-- Different languages use different date formats, and many formats are shared among whole families of languages.
"DateLang" picks a cluster of languages associated with a single date format, based on the language to be used.
All unlisted languages default to English form. Languages like "de-formal" follows regular language fallback chain
and would default to German, and only if that does not exist then to English.  
p.DateLang = {
['be'] = 'ru-form', -- Belarusian
['be-tarsk'] = 'ru-form', -- Belarusian (Tara۫ievica)
['bn'] = 'en-form', -- Bengali
['bpy'] = 'bpy-form', -- Bishnupuriya Manipuri
['ce'] = 'ce-form', -- Chechen
['cs'] = 'cs-form', -- Czech
['da'] = 'de-form', -- Danish
['de'] = 'de-form', -- German
['el'] = 'ru-form', -- Greek
['en'] = 'en-form', -- English
['eo'] = 'eo-form', -- Esperanto
['es'] = 'es-form', -- Spanish
['et'] = 'de-form', -- Estonian
['eu'] = 'eu-form', -- Basque
['fa'] = 'he-form', -- Persian
['fi'] = 'fi-form', -- Finnish
['fr'] = 'fr-form', -- French
['ga'] = 'ga-form', -- Gallic
['gl'] = 'es-form', -- Galician based on https://translatewiki.net/wiki/MediaWiki:Pagetriage-info-timestamp-date-format/gl
['hi'] = 'en-form', -- Hindi
['he'] = 'he-form', -- Hebrew
['hr'] = 'hr-form', -- Croatian
['hu'] = 'hu-form', -- Hungarian
['hsb'] = 'cs-form', -- Upper Sorbian
['ia'] = 'ia-form', -- Interlingua
['is'] = 'de-form', -- Icelandic
['ja'] = 'zh-form', -- Japanese
['kn'] = 'kn-form', -- Kannada
['ko'] = 'ko-form', -- Korean
['lt'] = 'lt-form', -- Lithuanian
['lv'] = 'lv-form', -- Latvian
['mk'] = 'en-form', -- Macedonian
['ml'] = 'ml-form', -- Malayalam
['mr'] = 'mr-form', -- Marathi
['new'] = 'new-form', -- Newari
['nn'] = 'de-form', -- Norwegian Nynorsk
['no'] = 'de-form', -- Norwegian (bokm欩
['oc'] = 'oc-form', -- Occitan
['pa'] = 'en-form', -- Punjabi
['pl'] = 'ru-form', -- Polish
['pt'] = 'es-form', -- Portuguese
['qu'] = 'qu-form', -- Quechua based on https://translatewiki.net/wiki/MediaWiki:Pagetriage-info-timestamp-date-format/qu
['qug'] = 'qug-form', -- Kichwa based on Template_talk:Date#Kichwa_.5Bqug.5D
['ru'] = 'ru-form', -- Russian
['sk'] = 'cs-form', -- Slovakian
['sl'] = 'sl-form', -- Slovene
['sr'] = 'hr-form', -- Serbian
['th'] = 'th-form', -- Thai solar calendar
['uk'] = 'ru-form', -- Ukrainian
['vi'] = 'vi-form', -- Vietnamese
['zh-hans'] = 'zh-form', -- Chinese
}  
-- Date format parameter which will be passed to parser function.
It depends on the language and which parts of the date need to be displayed.
Different forms are:
- YMDHMS = stands for YYYY:MM:DD, HH:MM:SS format or equivalent
- YMDHM = stands for YYYY:MM:DD, HH:MM format or equivalent
- YMD = stands for YYYY:MM:DD format or equivalent
- YM = stands for YYYY:MM (year-month) format or equivalent
- MD = stands for MM:DD (month-day) format or equivalent
- Y = stands for YYYY (year only) format or equivalent
- M = stands for month name only  
The hand side follows encoding used by parser function ,
see https://www.mediawiki.org/wiki/Help:Extension:ParserFunctions#.23time for documentation.
To summerize:
- Y - 4-digit year, like "2017"
- y - 2-digit year, like "17"
- M - An abbreviation of the month name, in the site language, like "Mar"
- F - The full month name in the site language, like "March"
- xg - Output the full month name in the genitive form for site languages that distinguish
between genitive and nominative forms. This option is useful for many Slavic languages
like Polish, Russian, Belarusian, Czech, Slovak, Slovene, Ukrainian, etc.
- j - Day of the month, not zero-padded, like "1"
- d - Day of the month, zero-padded, like "01"
- a - "am" during the morning (00:00:00 → 11:59:59), "pm" otherwise (12:00:00 → 23:59:59).
- A - Uppercase version of a above.
- g - Hour in 12-hour format, not zero-padded.
- h - Hour in 12-hour format, zero-padded.
- G - Hour in 24-hour format, not zero-padded.
- H - Hour in 24-hour format, zero-padded.
- i - Minutes past the hour, zero-padded.
- s - Seconds past the minute, zero-padded.  
Original set was developed to match the output of the pre-Lua template, preserved as  
p.DateFormat = {
-- day/month/year languages
['en-form'] = {
YMDHMS='j F Y, H:i:s',
YMDHM ='j F Y, H:i',
YMD ='j F Y',
YM ='F Y',
MD ='j F',
Y ='Y',
M ='F'
},
['de-form'] = {
YMDHMS='j. F Y, H:i:s',
YMDHM ='j. F Y, H:i',
YMD ='j. F Y',
YM ='F Y',
MD ='j. F',
Y ='Y',
M ='F'
},
['hr-form'] = {
YMDHMS='j. F Y., H:i:s',
YMDHM ='j. F Y., H:i',
YMD ='j. F Y.',
YM ='F Y.',
MD ='j. F',
Y ='Y.',
M ='F'
},
['ml-form'] = {
YMDHMS='j F Y, H:i:s',
YMDHM ='j F Y, H:i',
YMD ='j F Y',
YM ='F Y',
MD ='F j',
Y ='Y',
M ='F'
},
['th-form'] = {
YMDHMS='j F "พ.ศ." xkY, H:i:s',
YMDHM ='j F "พ.ศ." xkY, H:i',
YMD ='j F "พ.ศ." xkY',
YM ='F "พ.ศ." xkY',
MD ='j F',
Y ='"พ.ศ." xkY',
M ='F'
},
['fi-form'] = {
YMDHMS='j. F"ta" Y, H:i:s',
YMDHM ='j. F"ta" Y, H:i',
YMD ='j. F"ta" Y',
YM ='F Y',
MD ='j. F"ta"',
Y ='Y',
M ='F'
},
['es-form'] = {
YMDHMS='j "de" F "de" Y, H:i:s',
YMDHM ='j "de" F "de" Y, H:i',
YMD ='j "de" F "de" Y',
YM ='F "de" Y',
MD ='j "de" F',
Y ='Y',
M ='F'
},
['oc-form'] = {
YMDHMS='j F "de" Y, H:i:s',
YMDHM ='j F "de" Y, H:i',
YMD ='j F "de" Y',
YM ='F "de" Y',
MD ='j F',
Y ='Y',
M ='F'
},
['ia-form'] = {
YMDHMS='j "de" F Y, H:i:s',
YMDHM ='j "de" F Y, H:i',
YMD ='j "de" F Y',
YM ='F Y',
MD ='j "de" F',
Y ='Y',
M ='F'
},
['eo-form'] = {
YMDHMS='"la" j"-a de" F Y, H:i:s',
YMDHM ='"la" j"-a de" F Y, H:i',
YMD ='"la" j"-a de" F Y',
YM ='F Y',
MD ='"la" j"-a de" F',
Y ='Y',
M ='F'
},
['vi-form'] = {
YMDHMS='j F "năm" Y "lúc" H:i:s',
YMDHM ='j F "năm" Y "lúc" H:i',
YMD ='j F "năm" Y',
YM ='F "năm" Y',
MD ='j F',
Y ='Y',
M ='F'
},
['qu-form'] = {
YMDHMS='j "ñiqin" F"pi" Y "watapi", H:i:s',
YMDHM ='j "ñiqin" F"pi" Y "watapi", H:i',
YMD ='j "ñiqin" F"pi" Y "watapi"',
YM ='F"pi" Y "watapi"',
MD ='j "ñiqin" F"pi"',
Y ='Y',
M ='F'
},
['qug-form'] = {
YMDHMS='j "niki" F"pi" Y "watapi", H:i:s',
YMDHM ='j "niki" F"pi" Y "watapi", H:i',
YMD ='j "niki" F"pi" Y "watapi"',
YM ='F"pi" Y "watapi"',
MD ='j "niki" F"pi"',
Y ='Y',
M ='F'
},
['he-form'] = {
YMDHMS='"<span dir=rtl>"j xg Y"</span>", H:i:s',
YMDHM ='"<span dir=rtl>"j xg Y"</span>", H:i',
YMD ='"<span dir=rtl>"j xg Y"</span>"',
YM ='"<span dir=rtl>"F Y"</span>"',
MD ='"<span dir=rtl>"j xg"</span>"',
Y ='Y',
M ='"<span dir=rtl>"F"</span>"'
},  
-- French and Gallic languages require different form for first day of the month and
-- different for the other days
['fr-form'] = {
YMDHMS='j F Y, H:i:s',
YMDHM ='j F Y, H:i',
YMD ='j F Y',
YM ='F Y',
MD ='j F',
Y ='Y',
M ='F'
},
['ga-form'] = {
YMDHMS='j F Y, H:i:s',
YMDHM ='j F Y, H:i',
YMD ='j F Y',
YM ='F Y',
MD ='j F',
Y ='Y',
M ='F'
},
['fr-form1'] = { -- 1st of the month form
YMDHMS='j"<sup>er</sup>" F Y, H:i:s',
YMDHM ='j"<sup>er</sup>" F Y, H:i',
YMD ='j"<sup>er</sup>" F Y',
YM ='F Y',
MD ='j"<sup>er</sup>" F',
Y ='Y',
M ='F'
},
['ga-form1'] = { -- 1st of the month form
YMDHMS='j"<sup>ú</sup>" F Y, H:i:s',
YMDHM ='j"<sup>ú</sup>" F Y, H:i',
YMD ='j"<sup>ú</sup>" F Y',
YM ='F Y',
MD ='j"<sup>ú</sup>" F',
Y ='Y',
M ='F'
},  
-- day/month/year Slavic languages
['ru-form'] = {
YMDHMS='j xg Y, H:i:s',
YMDHM ='j xg Y, H:i',
YMD ='j xg Y',
YM ='F Y',
MD ='j xg',
Y ='Y',
M ='F'
},
['cs-form'] = {
YMDHMS='j. xg Y, H:i:s',
YMDHM ='j. xg Y, H:i',
YMD ='j. xg Y',
YM ='F Y',
MD ='j. xg',
Y ='Y',
M ='F'
},
['sl-form'] = {
YMDHMS='j. xg Y "ob" H:i:s',
YMDHM ='j. xg Y "ob" H:i',
YMD ='j. xg Y',
YM ='F Y',
MD ='j. xg',
Y ='Y',
M ='F'
},