The Gregorian calendar should be used.

The Arabic version of the Gregorian calendar should be used.

The Middle East French version of the Gregorian calendar should be used.

The US English version of the Gregorian calendar should be used.

The transliterated English version of the Gregorian calendar should be used.

The transliterated French version of the Gregorian calendar should be used.

The Hebrew lunar calendar, as described by the Gauss formula for Passover and The Complete Restatement of Oral Law, should be used.

The Hijri lunar calendar, as described by the Kingdom of Saudi Arabia, Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance, should be used.

The Japanese Emperor Era calendar, as described by Japanese Industrial Standard JIS X 0301, should be used.

The Korean Tangun Era calendar, as described by Korean Law Enactment No. 4, should be used.

Specifies that no calendar should be used.

The Saka Era calendar, as described by the Calendar Reform Committee of India, as part of the Indian Ephemeris and Nautical Almanac, should be used.

The Taiwanese calendar, as defined by the Chinese National Standard CNS 7648, should be used.

The Thai calendar, as defined by the Royal Decree of H.M. King Vajiravudh (Rama VI) in Royal Gazette B. E. 2456 (1913 A.D.) and by the decree of Prime Minister Phibunsongkhram (1941 A.D.) to start the year on the Gregorian January 1 and to map year zero to Gregorian year 543 B.C., should be used.