Nodejs Timezone Calculate toServerTimezone()

Method Source Code

Date.prototype.toServerTimezone = function () {
    var offset = new Date().getTimezoneOffset();
    this.setTime(this.getTime() - (offset * 60 * 1000));
    return this;//from   w ww.  j a  v a 2s .co m
}

Related

1. getDSTTimezoneOffset()

   Date.prototype.getDSTTimezoneOffset = function() {
     var jan = new Date(this.getFullYear(), 0, 1);
     var jul = new Date(this.getFullYear(), 6, 1);
     return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
   document.cookie = "auto_timezone_offset=" + -60 * new Date().getDSTTimezoneOffset();
   

2. getStdTimezone()

   Date.prototype.getStdTimezone = function() {
       var jan = new Date(2015, 0, 1);
       var jul = new Date(2015, 6, 1);
       return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
   

3. getTimezone()

   Date.prototype.getTimezone = function () {
       return this.toString().replace(
           /^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1").replace(
           /^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3");
   

4. getTimezoneOffsetgetTimezoneOffset()

   Date.prototype.getTimezoneOffset = function getTimezoneOffset() {
     if (this._timezoneOffsetStd === undefined) {
       var date1 = new Date(this.getFullYear(), this.getMonth(), this.getDate(),
                            0,0,0,0),
           temp = date1.toGMTString(),
           date2 = new Date(temp.substring(0, temp.lastIndexOf(" ")-1));
       this._timezoneOffsetStd = (date2 - date1) / 60000;
     return this._timezoneOffsetStd;
   ...
   

5. toClientTimezone()

   Date.prototype.toClientTimezone = function () {
       var offset = new Date().getTimezoneOffset();
       this.setTime(this.getTime() + (offset * 60 * 1000));
       return this;
   

6. tz(timezone)

   Date.prototype.tz = function(timezone) {
     var result = [], date;
     var utc = this.getTime();
     var data = data_IANA[timezone.toUpperCase()];
     if (data === undefined) {
       data = data_abbr[timezone.toUpperCase()];
     if (data !== undefined && data.constructor === String) {
       date = utc + (+data.split(':')[0] * 60 * 60 * 1000) + (((+data.split(':')[1]||0) * 60 * 1000) * (+data.split(':')[0] < 0 ? -1 : 1));
   ...