opening time of a Sales event, or a competition) as UNIX timestamp number (that's the number of seconds from in UTC, timezone-agnostic and DST0agnostic) to the client, and then do new Date(timestamp).toLocaleString(). (no passed parameter will use the user's default settings, which might be the ideal.)Īs a developer, just pass that point-in-time value (e.g. It even supports different calendars, languages, ways of formatting year, month, day, etc. It has more customization parameters for formatting than you can think of, via its two parameters of locale and options listed at DateTimeFormat. I strongly recommend reading this article that I wrote recently about the headaches of dealing with TimeZones in JS! What are you EXACTLY looking for?ĭepending on your actually use case, you actually need different things.ġ) A way to convert a fixed point-in-time (like November 13th of 2021 at 11:35:21pm in San Francisco) to the user's wall-clock time, who might be anywhere in the world. Surprise! you are about to open a can of worms! This question already has 30 answers, but I am sure there are people who will come here and really don't know what they are looking for. The toTimeString() method is especially useful because compliant engines implementing ECMA-262 may differ in the string obtained from toString() for Date objects, as the format is implementation-dependent simple string slicing approaches may not produce consistent results across multiple engines. Sometimes it is desirable to obtain a string of the time portion such a thing can be accomplished with the toTimeString() method. Calling toString() will return the date formatted in a human readable form in American English. That approach is not that reliable, as MDN explains:ĭate instances refer to a specific point in time. Note that many other answers to this question attempt to obtain the same information by calling Date.toString(). In Colombia, you'd get Colombia Standard Time, vs. In California right now, toTimeString() returns Pacific Daylight Time while the Intl API returns America/Los_Angeles. If possible in your scenario, I would recommend utilizing a javascript library like date-fns, luxon or dayjs which provide timezone support.Ĭonsole.log(new Date().toTimeString().slice(9)) Ĭonsole.log(Intl.DateTimeFormat().resolvedOptions().timeZone) Ĭonsole.log(new Date().getTimezoneOffset() / -60) This will give you "GMT-0400 (EST)" for example, including the timezone minutes when applicable.Īlternatively, with regex you can extract any desired part:įor "GMT-0400 (EDT)" : new Date().toString().match(/( .*)/)įor "GMT-0400" : new Date().toString().match(/( )/)įor just "EDT" : new Date().toString().match(/\((.*)\)/)įor just "-0400": new Date().toString().match(/( )\s/)ĮDIT - The above solution may not work in all browsers and locales. Var timeZoneFormatted = split " " split If you want the client timezone nicely formatted you can rely on the JavaScript Date.toString method and do: var split = new Date().toString().split(" ") I realize this answer is a bit off topic but I imagine many of us looking for an answer also wanted to format the time zone for display and perhaps get the zone abbreviation too. TimeZone property undefined in this case.Įdit 3-19-2022 - WARNING: I no longer recommend this approach as it has issues with multiple browsers and locales. TimeZone property was provided in the options object provided to the TimeZone property will be the name of the default time zone if no In this version of the ECMAScript 2015 Internationalization API, the In ecma-402/3.0 which is still in a draft it changed to Versions may return a String value identifying the host environment’s However, applications should not rely on this, as future Provided in the options object provided to the Intl.DateTimeFormatĬonstructor. TimeZone property will remain undefined if no timeZone property was In this version of the ECMAScript Internationalization API, the However, future draft (3.0) fixed that issue by changing to system default timezone. Old compatibility informationĮcma-402/1.0 says that timeZone may be undefined if not provided to constructor. Console.log(Intl.DateTimeFormat().resolvedOptions().timeZone) As of April 2022, this works in 93.5% of the browsers used globally.
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