docs: def getUTCDatetimeDOY(days=0, hours=0, minutes=0, seconds=0):
      """getUTCDatetimeDOY -> datetime
  
      Returns the UTC current datetime with the input timedelta arguments (days, hours, minutes, seconds)
      added to current date. Returns ISO-8601 datetime format for day of year:
  
          YYYY-DDDTHH:mm:ssZ
  
      """
      return (datetime.datetime.utcnow() + 
          datetime.timedelta(days=days, hours=hours, minutes=minutes, seconds=seconds)).strftime(DOY_Format)