The Buddha awakens beneath the Bodhi tree

Age: the Chinese Shi'er you jing has the Awakening at thirty-five; the Chinese Mūlasarvāstivāda Vinaya and some Buddha biographies have the going forth at nineteen followed by six years of austerities, which gives an awakening at twenty-five; the Tibetan Vinaya has the going forth at twenty-nine followed by six years of austerities. Source text

When dependent arising was contemplated: the Pali Vinaya and the Chinese Mahīśāsaka Vinaya place it on the night of the Awakening; the Chinese and Tibetan Mūlasarvāstivāda Vinaya place it when the Buddha returned to the Bodhi tree a second time; the Buddha biography Fo benxing ji jing places it after the first seven days.

What was attained in the three watches of the night: the Sanskrit Catuṣpariṣat Sūtra distributes the six higher knowledges across the three watches, with the destruction of the defilements attained in the last; Majjhima Nikāya 36 of the Southern tradition has the recollection of past lives in the first watch, the vision of beings dying and being reborn in the second, and the destruction of the defilements in the last; the Sanskrit Mahāvastu and the Sanskrit Lalitavistara reverse the order of the first two and say the awakening came as dawn was breaking. The Sanskrit Catuṣpariṣat Sūtra further says that immediately after awakening the Buddha entered the fire-element absorption (a meditative state in which the body gives off flames), as do the Chinese and Tibetan Mūlasarvāstivāda Vinaya.