Specifies the RTC Alarm is on day or WeekDay. This parameter can be a value of RTC_LL_EC_ALMA_WEEKDAY_SELECTION for ALARM A or RTC_LL_EC_ALMB_WEEKDAY_SELECTION for ALARM B This feature can be modified afterwards using unitary function LL_RTC_ALMA_EnableWeekday() or LL_RTC_ALMA_DisableWeekday() for ALARM A or LL_RTC_ALMB_EnableWeekday() or LL_RTC_ALMB_DisableWeekday() for ALARM B