mirror of https://github.com/therootcompany/tz.js
27 lines
707 B
JavaScript
27 lines
707 B
JavaScript
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/**
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* take a date of assumed timezone and convert to utc
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*
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* @param {*} d
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* @param {*} tz
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* @returns
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*/
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function tzUTC(d, tz) {
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// first calculate tz difference
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var date = new Date();
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var options = {
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year: 'numeric',
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month: 'numeric',
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day: 'numeric',
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hour: 'numeric',
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minute: 'numeric',
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second: 'numeric',
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hour12: false,
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timeZone: tz
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};
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var tzDate = new Intl.DateTimeFormat('en-US', options).format(date)
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var diff = date - new Date(tzDate);
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var minutes = Math.floor((diff / 1000) / 60);
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var localTime = new Date(d);
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localTime.setMinutes(d.getMinutes() + minutes);
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return localTime.toUTCString();
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}
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