Format JavaScript date as yyyy-mm-dd

Question

I have a date with the format Sun May 11,2014. How can I convert it to 2014-05-11 using JavaScript?

Answer 1

You can use toLocaleDateString('fr-CA') on Date object

console.log(new Date('Sun May 11,2014').toLocaleDateString('fr-CA'));

Also I found out that those locales give right result from this locales list List of All Locales and Their Short Codes?

'en-CA'
'fr-CA'
'lt-LT'
'sv-FI'
'sv-SE'

var localesList = ["af-ZA",
  "am-ET",
  "ar-AE",
  "ar-BH",
  "ar-DZ",
  "ar-EG",
  "ar-IQ",
  "ar-JO",
  "ar-KW",
  "ar-LB",
  "ar-LY",
  "ar-MA",
  "arn-CL",
  "ar-OM",
  "ar-QA",
  "ar-SA",
  "ar-SY",
  "ar-TN",
  "ar-YE",
  "as-IN",
  "az-Cyrl-AZ",
  "az-Latn-AZ",
  "ba-RU",
  "be-BY",
  "bg-BG",
  "bn-BD",
  "bn-IN",
  "bo-CN",
  "br-FR",
  "bs-Cyrl-BA",
  "bs-Latn-BA",
  "ca-ES",
  "co-FR",
  "cs-CZ",
  "cy-GB",
  "da-DK",
  "de-AT",
  "de-CH",
  "de-DE",
  "de-LI",
  "de-LU",
  "dsb-DE",
  "dv-MV",
  "el-GR",
  "en-029",
  "en-AU",
  "en-BZ",
  "en-CA",
  "en-GB",
  "en-IE",
  "en-IN",
  "en-JM",
  "en-MY",
  "en-NZ",
  "en-PH",
  "en-SG",
  "en-TT",
  "en-US",
  "en-ZA",
  "en-ZW",
  "es-AR",
  "es-BO",
  "es-CL",
  "es-CO",
  "es-CR",
  "es-DO",
  "es-EC",
  "es-ES",
  "es-GT",
  "es-HN",
  "es-MX",
  "es-NI",
  "es-PA",
  "es-PE",
  "es-PR",
  "es-PY",
  "es-SV",
  "es-US",
  "es-UY",
  "es-VE",
  "et-EE",
  "eu-ES",
  "fa-IR",
  "fi-FI",
  "fil-PH",
  "fo-FO",
  "fr-BE",
  "fr-CA",
  "fr-CH",
  "fr-FR",
  "fr-LU",
  "fr-MC",
  "fy-NL",
  "ga-IE",
  "gd-GB",
  "gl-ES",
  "gsw-FR",
  "gu-IN",
  "ha-Latn-NG",
  "he-IL",
  "hi-IN",
  "hr-BA",
  "hr-HR",
  "hsb-DE",
  "hu-HU",
  "hy-AM",
  "id-ID",
  "ig-NG",
  "ii-CN",
  "is-IS",
  "it-CH",
  "it-IT",
  "iu-Cans-CA",
  "iu-Latn-CA",
  "ja-JP",
  "ka-GE",
  "kk-KZ",
  "kl-GL",
  "km-KH",
  "kn-IN",
  "kok-IN",
  "ko-KR",
  "ky-KG",
  "lb-LU",
  "lo-LA",
  "lt-LT",
  "lv-LV",
  "mi-NZ",
  "mk-MK",
  "ml-IN",
  "mn-MN",
  "mn-Mong-CN",
  "moh-CA",
  "mr-IN",
  "ms-BN",
  "ms-MY",
  "mt-MT",
  "nb-NO",
  "ne-NP",
  "nl-BE",
  "nl-NL",
  "nn-NO",
  "nso-ZA",
  "oc-FR",
  "or-IN",
  "pa-IN",
  "pl-PL",
  "prs-AF",
  "ps-AF",
  "pt-BR",
  "pt-PT",
  "qut-GT",
  "quz-BO",
  "quz-EC",
  "quz-PE",
  "rm-CH",
  "ro-RO",
  "ru-RU",
  "rw-RW",
  "sah-RU",
  "sa-IN",
  "se-FI",
  "se-NO",
  "se-SE",
  "si-LK",
  "sk-SK",
  "sl-SI",
  "sma-NO",
  "sma-SE",
  "smj-NO",
  "smj-SE",
  "smn-FI",
  "sms-FI",
  "sq-AL",
  "sr-Cyrl-BA",
  "sr-Cyrl-CS",
  "sr-Cyrl-ME",
  "sr-Cyrl-RS",
  "sr-Latn-BA",
  "sr-Latn-CS",
  "sr-Latn-ME",
  "sr-Latn-RS",
  "sv-FI",
  "sv-SE",
  "sw-KE",
  "syr-SY",
  "ta-IN",
  "te-IN",
  "tg-Cyrl-TJ",
  "th-TH",
  "tk-TM",
  "tn-ZA",
  "tr-TR",
  "tt-RU",
  "tzm-Latn-DZ",
  "ug-CN",
  "uk-UA",
  "ur-PK",
  "uz-Cyrl-UZ",
  "uz-Latn-UZ",
  "vi-VN",
  "wo-SN",
  "xh-ZA",
  "yo-NG",
  "zh-CN",
  "zh-HK",
  "zh-MO",
  "zh-SG",
  "zh-TW",
  "zu-ZA"
];

localesList.forEach(lcl => {
  if ("2014-05-11" === new Date('Sun May 11,2014').toLocaleDateString(lcl)) {
    console.log(lcl, new Date('Sun May 11,2014').toLocaleDateString(lcl));
  }
});