July 30

The term Mashriqu'l-Adhkar is used in the Writings to describe various things, such as the gathering of the friends for dawn prayers; a building where this activity takes place; the complete institution of the Mashriqu'l-Adhkar with its dependencies; the central edifice of that institution, often described as a "Temple". These variants in use and meaning "can all be seen as denoting stages or aspects of the gradual introduction of Bahá'u'lláh's concept as promulgated in the Kitab-i-Aqdas." 
(The Research Department of the Universal House of Justice, Memorandum on ‘Functions and Importance of the Haziratu'l-Quds’)