Complex sentence: The World Interfaith Harmony Week will fall on the first week of February of every year for the purpose of the promotion of interfaith harmony between all of the world's religions among religious and spiritual congregations the world over.
Split into simpler sentences: The World Interfaith Harmony Week will fall on the first week of February of every year. Its purpose is the promotion of interfaith harmony between all of the world's religions among religious and spiritual congregations the world over.