Perhaps the most important festival of the year is commonly known as the Swing Festival. The four-day Akha Swing Festival comes in late-August each year and falls on the 120th day after the village has planted its rice. The Akha call the Swing Festival, "Yehkuja", which translates as "eating bitter rice", a phrase which references the previous year's dwindling rice supply incorporates the hope that monsoons will soon water the new crop. Festival activities include ritual offerings to family ancestral spirits at the ancestral altar in a corner of the women's side of the house. Offerings consist of bits of cooked food, water, and rice whiskey. The swing festival is particularly important for Akha women, who will display the clothing they spent all year making and who will show, through ornamentation, that they are becoming older and of marriageable age. Because the women dress up in their best traditional clothing and ornaments and perform traditional dances and songs for the villagers, the Swing Festival is also known as Women's New Year. The traditional New Year which falls in late-December is known as Men's New Year. The Akha put a heavy emphasis on genealogy. An important tradition involves the recounting by Akha males of their patrilineal genealogy. During the most important ceremonies the list is recited in its entirety back over 50 generations to the first Akha, Sm Mi O. It is said that all Akha males should be able to do so. The recounting of this lineage plays a role in the incest taboo: If a male and female Akha find a common male ancestor within their last six generations, they are not allowed to marry. The Akha have several sets of rules governing matters on life, death, marriage, and birth. Akha traditionally marry in their teens or early twenties. Polygamy is permitted. Marriages may be village endogamous or exogamous. Wife-giving and -taking relationships are central to Akha society, with wife-givers superior to wife-takers. Twins are considered an extremely ominous occurrence, one where spirits are considered to interfere with human matters. The Akha believed that only animals could give birth to more than one offspring and therefore considered twins as beasts. Up until about 20 years or so ago, they would have been killed immediately. According to Laos locals, the practice is still common although the government is trying to discourage it. Akha men whose wives had given birth to twins would not be allowed to participate on the hunt for a specific period.