Literally the name Ayyam-i-Ha means "days of Ha". In the Arabic language, a spiritual meaning was attached to each letter, the letter “Ha” is a symbol of the “Essence of God”, like it. Intercalary days are limitless, they are outside the time measurement system that humanity uses, they symbolize the unknowable Essence of God, mystery and infinity, this is how Bahá’u’lláh interpreted them, approved the Badi calendar in the 19th century.