Māgha Pūjā, Makha Bucha, or the Full Moon of Tabaung (Khmer: មាឃបូជា; Lao: ມະຄະບູຊາ; Burmese: တပေါင်းလပြည့်နေ့, Thai: มาฆบูชา (Pronunciation)) is an important Buddhist festival celebrated in Myanmar (Burma), Thailand, Cambodia, and Laos on the full moon day of the third lunar month (this usually falls in February). The third lunar month is known in the Thai language as Makha (Pali: Māgha); Bucha is also a Thai word (Pali: Pūjā), meaning "to venerate" or "to honor". As such, Makha Bucha Day is for the veneration of Buddha and his teachings on the full moon day of the third lunar month.

The spiritual aims of the day are: not to commit any kind of sins; do only good; purify one's mind.

Māgha Pūjā is a public holiday in Burma (Myanmar), Cambodia, Laos and Thailand - and is an occasion when Buddhists tend to go to the temple to perform merit-making activities.

Māgha Pūjā day marks the four auspicious occasions, which happened nine months after the Enlightenment of the Buddha at Veḷuvana Bamboo Grove, near Rājagaha in Northern India. On that occasion, as recorded in the commentary to the Mahāsamayasutta, DN-Comm 20) four marvellous events occurred: