On November 23, according to the Gregorian calendar, the Bahá'ís begin the month of Kaul, which translated from Arabic means «Speech». On this day —, the first day of the month of Kaul according to the nineteen-month Bahá'í calendar — marks the important holiday — the holiday of the Nineteenth Day of the month of Kaul.
The Baha'i calendar was founded by Bab and approved by the founder of the Baha'i Faith — Bahá'u'lláh. According to this calendar, the Bahá'í year is divided into 19 months of 19 days each. Months in the Bahá'í calendar are given the name of God's attributes, for example: «Greatness», «Perfection», «Will», «Knowledge», «Honor» or human properties: «Questions», «Speech» and others.
The beginning of the month is celebrated with the Festival of the Nineteenth Day. Each Nineteenth Day Festival is named after the beginning month. Each holiday performs several functions: administrative, spiritual, social.
Baha'is gather every nineteen days for such a celebration of unity and exchange information about the life of the community, read prayers and scriptures, drink tea, and communicate. Thus, the Nineteenth Day Festival is an integral part of the administrative and spiritual life of the Baha'i community.