Your helper function runs in nodejs. This means you can use tricks and libraries that work in node. I believe this information gives you a better idea of how to search for problems solutions.
You can, for example, use popular package momentjs, that provide helpers to get a date in a specific timezone.
Install moment-timezone
npm i moment-timezone --save
Use it in the helper
const moment = require('moment-timezone')
function now() {
return moment.tz("Europe/London").format()
}
