2.2.7 Calendar Type Extensions

The simple type ST_CalendarType specified in [ISO/IEC29500-1:2016] section is extended by the addition of the "umalqura" value to the enumeration. This value specifies that the Um Al-Qura lunar calendar as described by the Kingdom of Saudi Arabia, King Abdulaziz City for Science and Technology (KACST) MUST be used. To maintain compatibility with ISO/IEC-29500, the value MUST be specified in an AlternateContent element ([ISO/IEC29500-3:2015] section 10.2.1) with a fallback to the "hijri" calendar type.