Hi Walid,
Try this an Arcade expression to generate the desired date range.
var currentDate = Date()
var endDate = DateAdd(currentDate, -1, 'days')
var startDate = DateAdd(endDate, -29, 'days')
var startDateFormat = Text(startDate, "MMMM d, yyyy")
var endDateFormat = Text(endDate, "MMMM d, yyyy")
return startDateFormat + " - " + endDateFormat