In Iranian mythology, Haurvat, or Haurvatat, is one of the deities that make up the immediate environment of Ahura Mazda, the supreme essence of this pantheon. In the ritual calendar of modern adherents of Zoroastrianism, the name Haurvat in the Persian form Khordad is used to designate one of the days of the thirty-day month and one of the twelve months.
The Avesta, a collection of Zoroastrian sacred texts, has survived to this day in the form of scattered fragments. The surviving texts are traditionally divided into five parts. Information about the entity called Haurvat is contained mainly in the first part, known as Yasna, and in the fourth, called Yashty. The Avestan texts do not allow for a clear understanding of what Amesha Spenta, the “immortal saints”, among whom Haurvat is mentioned, were. However, this is not surprising, since the most ancient part of "Yasna" dates back to the thousandth or thousand two hundredth year BC, and the creation of later fragments dates back to the 6th century BC. A number of researchers prefer to see in Amesha Spenta not individual characters, but a manifestation of the properties of the supreme deity. Haurvat is associated with wholeness, understood as the opposite of illness and death, the fullness of physical existence. Haurvat is also the patron saint of water, and its distinctive symbol is the lily.
In the solar calendar, which is used by adherents of Zoroastrianism for ritual purposes, not only months, but also each of the thirty days that make them up, had their own names. These names are listed in the text "Clear" and are the names of the Yazats, the beings who should be worshiped. Among them are Amesha Spenta, among which Haurvat is mentioned. In the ritual calendar, later variants of names are used, derived from the Avestan in the form of the genitive case, therefore the sixth day of the month is called Khordad in it. The names of the months of the calendar repeat the names of twelve yazats, as a result of which the coincidence of both names falls on the sixth day of the sixth month. This day is one of the small Zoroastrian holidays and is called "Jashn-e Khordadgan". It is celebrated on the banks of rivers or near springs on May 25.
In the Zoroastrian calendar of P. Globa, which adheres to the Zervanian (Zurvanian) concept, which differs from the traditional Zoroastrianism, the holiday of Haurvat is mentioned, which falls on June 18.