B.E.12, or "B.E. 12," refers to a specific year in the Buddhist Era, which is used in several Southeast Asian countries. The Buddhist calendar is based on the life of the Buddha, with the year 543 BCE considered the starting point. Therefore, B.E.12 corresponds to 531 CE in the Gregorian calendar. In the context of historical events, B.E.12 may not have significant global recognition but is relevant in local histories and cultural practices. It is often used in religious contexts, particularly in Thailand and Cambodia, where the Buddhist calendar plays a crucial role in festivals and ceremonies.