As shown by the terms, matsuri and Monoimi (to purify oneself by abstaining from certain foods), and a festival day and a holy day, a rhythm contrasting a joyful occasion (festival) with the time to get oneself ready for joyful occasion (Monoimi) is incorporated in the tradition of Orthodox Church and is a standard of everyday life, and when this is explained, the term 'matsuri' and its concept are often used.
祭と斎（ものいみ）、祭日（さいじつ）と斎日（ものいみび）というように、喜ばしい時（祭）と、自らを喜ばしい時に備える時（斎）とを対比させるリズムは正教会の伝統に組み込まれて日常生活の規範となっており、これを説明する際に「祭」の語・概念が多用される。