Is it possible to get current time of a different time zone which is not the system time zone which will take into account the daylight savings (if present) there?

[Aditya64]

Long question : I want to show on a form if a user is out of working hours in his current time zone. Consider only one timezone for this question for now(Let's say time zone X). For this I am getting the servicenow system time value in a script include and adding the offset hours (+10) to that value to get the current time in time zone X. And then calculate if that current time there is out of working hours or not. I have written this code which works:

                var gdt = new GlideDateTime();

                var hours = 60 * 60 * 10;
                gdt.addSeconds(hours);
                
                var myarr = String(gdt.toString());

                myarr = myarr.split(' ');
               
                var time = myarr[1];
                
                time = time.split(':');
                var hour = time[0];
                var minute = time[1];
                

                var hour1 = parseInt(hour, 10);
                var minute1 = parseInt(minute, 10);
           
                if ((hour1 < 16 && hour1 > 8) || ( hour1 == 8 && minute1 > 14) || (hour1 == 16 && minute1 < 31)){ 
                       

                       
                        return 'false'; //Not out of working hours

                    } else {


                        
                        return 'true'; //out of working hours


                    }

I know I could use getTime() and compare to glideTime values but it was not working hence used the long method to compare if the current time in time zone X is between 8:15am to 4:30pm . This code is working fine. Problem is that there is a daylight saving going on in Time Zone X, because of which my time calculation of time zone X is 1 hour less than the one being used. I need it to work 24*7*365. 

How can I correctly calculate the time in time zone X (system time +10 hours) which will take into account the daylight saving status too?

[Hitoshi Ozawa]

Instead of hardcoding calculating working hours in a script, how about using GlideSchedule with timeZone.

GlideSchedule(String sysID, String timeZone)

https://developer.servicenow.com/print_page.do?release=paris&category=null&identifier=c_GlideSchedul...

[Hitoshi Ozawa]

Something like this. Schedule is in "System Scheduler" > "Schedules" > "Schedule". "8-5 weekdays" is one of the OOTB schedule.

function checkInWorkingHours(dateTime, timezone) {
var sched= new GlideSchedule('08fcd0830a0a0b2600079f56b1adb9ae', timezone); // sys_id of "8-5 weekdays" schedule
   var date = new GlideDateTime();
   date.setDisplayValue(dateTime);
   if (sched.isInSchedule(date)) 
      return true;
   else
      return false;
}
var dateTime = '2022-03-24 24:30:00';
var timezone = 'America/New_York';

var isInWorkingHours = checkInWorkingHours(dateTime, timezone);
if (isInWorkingHours) {
  gs.info("In working hours");
} else {
  gs.info("Not in working hours");
}