The nineteen months of the Bahá'í calendar are named after the attributes of God.[8] Ayyám-i-Há, which means the "Days of Há" — Há is the Arabic letter corresponding to the English H — commemorates the transcendence of God over his attributes, since its name "Há" has been used as a symbol of the essence of God in the Bahá'í holy writings.[5][9] Under the Arabic abjad system, the letter Há has the numerical value of five, which is equal to the maximum number of days in Ayyam-i-Há.[5]