Twelfth Day of Ridvan

It is the last day of the Most Holy Festival for Bahá'ís everywhere.

Read about it
"Suffer me not, O my Lord, to be deprived of the knowledge of Thee in Thy days, and divest me not of the robe of Thy guidance. Give me to drink of the river that is life indeed, whose waters have streamed forth from the Paradise (Ridvan) in which the throne of Thy Name, the All-Merciful, was established, that mine eyes may be opened, and my face be illumined, and my heart be assured, and my soul be enlightened, and my steps be made firm."
(Prayers and Meditations, 4)