The company_calendar signal now supports the extend parameter combined with alignment='rd', which means that it can produce future report dates. (Previously extend could only be used with the alignments fp and afp.)
freq can have the values FQ/FS (default), FQ, FS and FY.
extend can be a Boolean or an integer and can be used to limit the number of future dates returned. In order not to change existing signals, the default value is True (whereas it is False for company_calendar).