Hi
To change the format, you first need to set up GlideDateTime using your current format
var date = '10 Jul 2018 12:30:00';
var simpleDateFormat = 'dd MMMM yyyy HH:mm:ss'; // Simple Date Time format
var gdt = new GlideDateTime();
gdt.setDisplayValue(date,simpleDateFormat); //Set time using current TZ
gs.addInfoMessage(gdt.getDisplayValue()); // Output time in current TZ
Once your GlideDateTime object has the correct time, you can manipulate it as you need.
gdt.addDays(7);
gs.addInfoMessage(gdt.getDisplayValue());
And back again to your original format, with the added 7 days
var gd = gdt.getLocalDate();
var gt = gdt.getLocalTime();
gs.addInfoMessage(gd.getByFormat('dd MMM yyyy') + gt.getByFormat(' HH:mm:ss'));
refer this artical for more:
https://community.servicenow.com/community?id=community_blog&sys_id=bc0e6a2ddbd0dbc01dcaf3231f961931
If it help mark helpful or correct
Thanks and regards
Anil
