10 examples of 'javascript convert date to utc timestamp' in JavaScript

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export function dateToUTC(timestamp) {
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  const date = new Date(timestamp * 1000);
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  return new Date(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(),
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    date.getUTCHours(), date.getUTCMinutes(),  date.getUTCSeconds());
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}

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export function dateUTCToLocal( date )
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{
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  return new Date( date.getTime( ) + TimeZoneOffset );
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}

3
export function timestampToDate(timestamp?: pb.google.protobuf.ITimestamp) {
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  let millis: number
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  if (!timestamp) {
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    millis = 0
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  } else {
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    millis = timestamp.seconds as number * 1e3 + timestamp.nanos / 1e6
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  }
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  return new Date(millis)
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}

4
function treatAsUtc(dateStr) {
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	let result = new Date(dateStr);
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	result.setMinutes(result.getMinutes() - result.getTimezoneOffset());
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	return result;
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}

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export function toDate(stamp: Time): Date {
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  const { sec, nsec } = stamp;
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  return new Date(sec * 1000 + nsec / 1e6);
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}

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function dateConverter(timestamp, format) {
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  //JS uses nanoseconds, hence the *100 multiplication
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  var a = new Date(timestamp * 1000);
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  //short names of all twelve months
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  var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
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  //thee variables used for getting timestamp time
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  var hrs = a.getHours(),
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    min = a.getMinutes(),
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    sec = a.getSeconds();
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  //improving readability: adding leading zero
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  if (hrs === 0) { 
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    hrs = "0" + hrs;
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  }
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  if (min < 10) {
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    min = "0" + min;
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  }
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  if (sec < 10) {
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    sec = "0" + sec;
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  }
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  if (!format) {
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    //returns in format 'd M Y, H:i:s'
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    return a.getDate() + ' ' + 
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      months[a.getMonth()] + ' ' + 
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      a.getFullYear() + ', ' + 
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      hrs + ':' + min + ':' + sec;
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  } else if (format === "time") {
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    return hrs + ':' + min + ':' + sec;
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  }
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}

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export function getDateFromTimestamp(milliseconds) {
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  return moment.utc(parseInt(milliseconds, 10)).toDate();
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}

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function time_converter(UNIX_timestamp) {
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  var a = new Date(UNIX_timestamp * 1000);
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  var year = a.getFullYear();
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  var month = a.getMonth() + 1;
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  var date = a.getDate();
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  var hour = a.getHours();
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  var min = a.getMinutes();
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  var sec = a.getSeconds();
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  var time =
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    year +
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    '-' +
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    pad(month, 2) +
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    '-' +
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    pad(date, 2) +
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    ' ' +
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    pad(hour, 2) +
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    ':' +
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    pad(min, 2) +
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    ':' +
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    pad(sec, 2);
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  return time;
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}

17
function datetime_to_datetime(d)
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{
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    var date = new Date(d);
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    var now_utc =  Date.UTC(date.getUTCFullYear(), date.getUTCMonth(),
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                            date.getUTCDate(), date.getUTCHours(),
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                            date.getUTCMinutes(), date.getUTCSeconds());
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    return new Date(now_utc);
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}

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function toUnixTimestamp(date) {
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  return Math.floor(date.getTime() / 1000);
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}