Baci
| Baci | |
|---|---|
 The phu khwan is integral to Baci ceremony | |
| Also called | su khwan |
| Observed by | Lao people, Isan people, Northern Thai people |
| Type | Satsana Phi, religious rite |
| Significance | Celebration of any auspicious event |
| Celebrations | Decorating silver tray with flowers, banana leaves, bamboo poles with white cotton threads for worship |
| Observances | National custom |
| Date | Any day of the week, before noon |
| Related to | Khwan Culture, Rik-khwan (Ahom religion) |
Baci/Basi (Lao: ບາສີ; Thai: บายศรี, RTGS: bai si) and su kwan (Lao: ສູ່ຂວັນ; Thai: สู่ขวัญ, RTGS: su khwan; meaning "calling of the soul") is an important ceremony practised in Lao culture, Sipsong Panna, Northern Thailand and Northeastern Thailand (Isan).
Baci is a phi ritual used to celebrate important events and occasions, like births and marriages and also entering the monkhood, departing, returning, beginning a new year, and welcoming or bidding etc. The ritual involves tying strings around a person's wrist to preserve good luck, and has become a national custom.