An especially prominent example, still widely taught in primary schools, is that the "Weton" for the Proclamation of Indonesian Independence on 17 August 1945 took place on "Jumat Legi"; this is also the "Weton" for the birth and death of Sultan Agung, one of the greatest kings of Java and the inventor of the modern Javanese calendar. Therefore, "Jumat Legi" is considered an important night for pilgrimage. There are also taboos that relate to the cycle; for example, the ritual dance bedhaya can only be performed on "Kemis Kliwon".