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MySQL 8.0 Reference Manual  /  Character Sets, Collations, Unicode  /  MySQL Server Locale Support

10.16 MySQL Server Locale Support

The locale indicated by the lc_time_names system variable controls the language used to display day and month names and abbreviations. This variable affects the output from the DATE_FORMAT(), DAYNAME(), and MONTHNAME() functions.

lc_time_names does not affect the STR_TO_DATE() or GET_FORMAT() function.

The lc_time_names value does not affect the result from FORMAT(), but this function takes an optional third parameter that enables a locale to be specified to be used for the result number's decimal point, thousands separator, and grouping between separators. Permissible locale values are the same as the legal values for the lc_time_names system variable.

Locale names have language and region subtags listed by IANA (http://www.iana.org/assignments/language-subtag-registry) such as 'ja_JP' or 'pt_BR'. The default value is 'en_US' regardless of your system's locale setting, but you can set the value at server startup, or set the GLOBAL value at runtime if you have privileges sufficient to set global system variables; see Section 5.1.9.1, “System Variable Privileges”. Any client can examine the value of lc_time_names or set its SESSION value to affect the locale for its own connection.

mysql> SET NAMES 'utf8';
Query OK, 0 rows affected (0.09 sec)

mysql> SELECT @@lc_time_names;
+-----------------+
| @@lc_time_names |
+-----------------+
| en_US           |
+-----------------+
1 row in set (0.00 sec)

mysql> SELECT DAYNAME('2010-01-01'), MONTHNAME('2010-01-01');
+-----------------------+-------------------------+
| DAYNAME('2010-01-01') | MONTHNAME('2010-01-01') |
+-----------------------+-------------------------+
| Friday                | January                 |
+-----------------------+-------------------------+
1 row in set (0.00 sec)

mysql> SELECT DATE_FORMAT('2010-01-01','%W %a %M %b');
+-----------------------------------------+
| DATE_FORMAT('2010-01-01','%W %a %M %b') |
+-----------------------------------------+
| Friday Fri January Jan                  |
+-----------------------------------------+
1 row in set (0.00 sec)

mysql> SET lc_time_names = 'es_MX';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @@lc_time_names;
+-----------------+
| @@lc_time_names |
+-----------------+
| es_MX           |
+-----------------+
1 row in set (0.00 sec)

mysql> SELECT DAYNAME('2010-01-01'), MONTHNAME('2010-01-01');
+-----------------------+-------------------------+
| DAYNAME('2010-01-01') | MONTHNAME('2010-01-01') |
+-----------------------+-------------------------+
| viernes               | enero                   |
+-----------------------+-------------------------+
1 row in set (0.00 sec)

mysql> SELECT DATE_FORMAT('2010-01-01','%W %a %M %b');
+-----------------------------------------+
| DATE_FORMAT('2010-01-01','%W %a %M %b') |
+-----------------------------------------+
| viernes vie enero ene                   |
+-----------------------------------------+
1 row in set (0.00 sec)

The day or month name for each of the affected functions is converted from utf8 to the character set indicated by the character_set_connection system variable.

lc_time_names may be set to any of the following locale values. The set of locales supported by MySQL may differ from those supported by your operating system.

Locale Value Meaning
ar_AE Arabic - United Arab Emirates
ar_BH Arabic - Bahrain
ar_DZ Arabic - Algeria
ar_EG Arabic - Egypt
ar_IN Arabic - India
ar_IQ Arabic - Iraq
ar_JO Arabic - Jordan
ar_KW Arabic - Kuwait
ar_LB Arabic - Lebanon
ar_LY Arabic - Libya
ar_MA Arabic - Morocco
ar_OM Arabic - Oman
ar_QA Arabic - Qatar
ar_SA Arabic - Saudi Arabia
ar_SD Arabic - Sudan
ar_SY Arabic - Syria
ar_TN Arabic - Tunisia
ar_YE Arabic - Yemen
be_BY Belarusian - Belarus
bg_BG Bulgarian - Bulgaria
ca_ES Catalan - Spain
cs_CZ Czech - Czech Republic
da_DK Danish - Denmark
de_AT German - Austria
de_BE German - Belgium
de_CH German - Switzerland
de_DE German - Germany
de_LU German - Luxembourg
el_GR Greek - Greece
en_AU English - Australia
en_CA English - Canada
en_GB English - United Kingdom
en_IN English - India
en_NZ English - New Zealand
en_PH English - Philippines
en_US English - United States
en_ZA English - South Africa
en_ZW English - Zimbabwe
es_AR Spanish - Argentina
es_BO Spanish - Bolivia
es_CL Spanish - Chile
es_CO Spanish - Colombia
es_CR Spanish - Costa Rica
es_DO Spanish - Dominican Republic
es_EC Spanish - Ecuador
es_ES Spanish - Spain
es_GT Spanish - Guatemala
es_HN Spanish - Honduras
es_MX Spanish - Mexico
es_NI Spanish - Nicaragua
es_PA Spanish - Panama
es_PE Spanish - Peru
es_PR Spanish - Puerto Rico
es_PY Spanish - Paraguay
es_SV Spanish - El Salvador
es_US Spanish - United States
es_UY Spanish - Uruguay
es_VE Spanish - Venezuela
et_EE Estonian - Estonia
eu_ES Basque - Spain
fi_FI Finnish - Finland
fo_FO Faroese - Faroe Islands
fr_BE French - Belgium
fr_CA French - Canada
fr_CH French - Switzerland
fr_FR French - France
fr_LU French - Luxembourg
gl_ES Galician - Spain
gu_IN Gujarati - India
he_IL Hebrew - Israel
hi_IN Hindi - India
hr_HR Croatian - Croatia
hu_HU Hungarian - Hungary
id_ID Indonesian - Indonesia
is_IS Icelandic - Iceland
it_CH Italian - Switzerland
it_IT Italian - Italy
ja_JP Japanese - Japan
ko_KR Korean - Republic of Korea
lt_LT Lithuanian - Lithuania
lv_LV Latvian - Latvia
mk_MK Macedonian - North Macedonia
mn_MN Mongolia - Mongolian
ms_MY Malay - Malaysia
nb_NO Norwegian(Bokmål) - Norway
nl_BE Dutch - Belgium
nl_NL Dutch - The Netherlands
no_NO Norwegian - Norway
pl_PL Polish - Poland
pt_BR Portugese - Brazil
pt_PT Portugese - Portugal
rm_CH Romansh - Switzerland
ro_RO Romanian - Romania
ru_RU Russian - Russia
ru_UA Russian - Ukraine
sk_SK Slovak - Slovakia
sl_SI Slovenian - Slovenia
sq_AL Albanian - Albania
sr_RS Serbian - Serbia
sv_FI Swedish - Finland
sv_SE Swedish - Sweden
ta_IN Tamil - India
te_IN Telugu - India
th_TH Thai - Thailand
tr_TR Turkish - Turkey
uk_UA Ukrainian - Ukraine
ur_PK Urdu - Pakistan
vi_VN Vietnamese - Vietnam
zh_CN Chinese - China
zh_HK Chinese - Hong Kong
zh_TW Chinese - Taiwan