藏曆
Lhabab Duchen is a public holiday generally falling in November (on the 9th month, 22nd day of the Tibetan calendar). Lhabab Duchen marks Gautama Buddha's return to earth after attaining Nirvana. In the eastern regions of Bhutan, the holiday is a popular occasion for performing Lhasoel, which are religious offerings in the form of "ara" (traditional wine), blessings, and supplications.