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# [xtz.js](https://github.com/therootcompany/tz.js)
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					# [xtz.js](https://github.com/therootcompany/tz.js)
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A fast, lightweight, zero-dependency library to
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					A fast, lightweight, zero-dependency library to translate between Time Zones and UTC with native `Intl.DateTimeFormat`
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translate between Time Zones and UTC with native
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					in ~100 LoC. For Node.js & Browsers.
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`Intl.DateTimeFormat` in ~100 LoC. For Node.js & Browsers.
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XTZ is a poor man's Temporal polyfill, but just for time zones.
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					XTZ is a poor man's Temporal polyfill, but just for time zones.
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@ -155,7 +154,8 @@ Or our bespoke date object:
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var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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					var utcDate = TZ.toUTC("2021-11-07 03:15:59.000", "America/New_York");
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```
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					```
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You can also use a date object as the source time, but the date's UTC time will be treated as **_relative to time zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support).
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					You can also use a date object as the source time, but the date's UTC time will be treated as **_relative to time
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					zone_** rather than absolute (this is a workaround for JavaScript's lack of bi-directional timezone support).
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```js
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					```js
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var utcDate = TZ.toUTC(
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					var utcDate = TZ.toUTC(
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@ -180,7 +180,8 @@ utcDate.toISOString();
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Q: What happens in March when 2am is skipped?
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					Q: What happens in March when 2am is skipped?
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-   A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which is an hour early in real ("tick-tock" or "monotonic") time.
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					- A: Although 2am is not a valid time, rather than throwing an error this library will resolve to 1am instead, which
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					  is an hour early in real ("tick-tock" or "monotonic") time.
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  ```js
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					  ```js
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  var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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					  var utcDate = TZ.toUTC("2021-03-14 02:15:59.000", "America/New_York");
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  utcDate.toISOString();
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					  utcDate.toISOString();
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@ -190,7 +191,8 @@ Q: What happens in March when 2am is skipped?
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Q: What happens in November when 2am happens twice?
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					Q: What happens in November when 2am happens twice?
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-   A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time with this library.
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					- A: Although both 2ams are distinguishable with ISO offset times, only the first can be resolved from a local time
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					  with this library.
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  ```js
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					  ```js
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  var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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					  var utcDate = TZ.toUTC("2021-11-07 01:15:59.000", "America/New_York");
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  utcDate.toISOString();
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					  utcDate.toISOString();
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								examples.js
									
									
									
									
									
								
							
							
						
						
									
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							@ -22,9 +22,7 @@ var XTZ;
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    console.info();
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					    console.info();
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    console.info("\t// during daylight savings");
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					    console.info("\t// during daylight savings");
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        console.info(
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					    console.info(`\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`);
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            `\tXTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York")`
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        );
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    console.info(`\ttzDate.toISOString()`);
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					    console.info(`\ttzDate.toISOString()`);
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    tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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					    tzDate = XTZ.toUTC("2021-03-14 08:15:59.000", "America/New_York");
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    console.info(
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					    console.info(
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@ -35,9 +33,7 @@ var XTZ;
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    console.info();
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					    console.info();
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    console.info("\t// during standard time");
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					    console.info("\t// during standard time");
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        console.info(
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					    console.info(`\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`);
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            `\tXTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York")`
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        );
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    console.info(`\ttzDate.toISOString()`);
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					    console.info(`\ttzDate.toISOString()`);
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    tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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					    tzDate = XTZ.toUTC("2021-11-07 08:15:59.000", "America/New_York");
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    console.info(
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					    console.info(
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@ -52,9 +48,7 @@ var XTZ;
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  // Time Zone-relative time translated to UTC
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					  // Time Zone-relative time translated to UTC
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  //
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					  //
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  function demo2() {
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					  function demo2() {
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        console.info(
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					    console.info("What time is it in New York at 8:15am on March 14th UTC?");
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            "What time is it in New York at 8:15am on March 14th UTC?"
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        );
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    console.info();
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					    console.info();
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    console.info("\t// during daylight savings");
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					    console.info("\t// during daylight savings");
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@ -71,9 +65,7 @@ var XTZ;
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    console.info();
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					    console.info();
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    console.info("\t// during standard time");
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					    console.info("\t// during standard time");
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        console.info(
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					    console.info(`\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`);
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            `\tXTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York")`
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        );
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    console.info(`\ttzDate.toISOString()`);
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					    console.info(`\ttzDate.toISOString()`);
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    tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
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					    tzDate = XTZ.toUTC("2021-11-07T08:15:59.000Z", "America/New_York");
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    console.info(
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					    console.info(
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										9
									
								
								xtz.js
									
									
									
									
									
								
							
							
						
						
									
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							@ -70,8 +70,7 @@ var XTZ;
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  function getOffset(utcDate, tzD2) {
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					  function getOffset(utcDate, tzD2) {
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    var tzDate = new Date(toOffsetISOString(tzD2));
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					    var tzDate = new Date(toOffsetISOString(tzD2));
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        var diff =
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					    var diff = Math.round(tzDate.valueOf() - utcDate.valueOf()) / (60 * 1000);
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            Math.round(tzDate.valueOf() - utcDate.valueOf()) / (60 * 1000);
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    return diff;
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					    return diff;
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  }
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					  }
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@ -99,9 +98,7 @@ var XTZ;
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    // +0500, -0730
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					    // +0500, -0730
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    return (
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					    return (
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            offset +
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					      offset + h.toString().padStart(2, "0") + m.toString().padStart(2, "0")
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            h.toString().padStart(2, "0") +
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            m.toString().padStart(2, "0")
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    );
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					    );
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  }
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					  }
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@ -179,4 +176,4 @@ var XTZ;
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  if ("undefined" != typeof module && module.exports) {
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					  if ("undefined" != typeof module && module.exports) {
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    module.exports = XTZ;
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					    module.exports = XTZ;
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  }
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					  }
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}());
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					})();
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