GLib.Date.prototype.add_months

function add_months(n_months: Number(guint)): void {
    // Gjs wrapper for g_date_add_months()
}
  

Increments a date by some number of months. If the day of the month is greater than 28, this routine may change the day of the month (because the destination month may not have the current day in it). The date must be valid.