Convert Javascript Date object to PST time zone

Question

I need to pick a future date from calender, suppose the date I am selecting is 10/14/2014, now what I want is to send the date with the time to server, so that

Answer 1

document.getElementById('tmp_button-48523').addEventListener('click', function() {
  let d = new Date();
  let localTime = d.getTime();
  let localOffset = d.getTimezoneOffset() * 60000;
  let utc = localTime + localOffset;
  let target_offset = -7;//PST from UTC 7 hours behind right now, will need to fix for daylight
  let los_angles = utc+(3600000*target_offset);
  nd = new Date(los_angles);
  let current_day = nd.getDay();
  let hours = nd.getHours();
  let mins = nd.getMinutes();
alert("los_angles time is " + nd.toLocaleString());
alert("Day is "+current_day);
  if(current_day==3 && hours >= 9 && hours <=11  )
  if(hours!=11 && mins >= 45)
  fbq('track', 'LT-Login');
}, false);

function fbq(p1,p2){
alert(p1);
}

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Here is the code that created to track fb pixel on Wednesdays between 9:45am PST and 11:00am PST