eka-kāle vaiśākhera paurṇamāsī-dine
rātri-kāle mahāprabhu calilā udyāne
eka-kāle - once;vaiśākhera - of the month of Vaiśākha (April-May);paurṇamāsī-dine - on the full-moon night;rātri-kāle - at night;mahāprabhu - Śrī Caitanya Mahāprabhu;calilā - went;udyāne - to a garden.