Of necessity a general outline sketch of the formation of the Kalendar is all that can be attempted in the following pages. Local Kalendars, more especially, for most of our readers, those of the service-books of England, Scotland, and Ireland, present many interesting and attractive features; but it has been impossible to deal with them in an adequate manner. Some space has, however, been devoted to the consideration of the Kalendar and Ecclesiastical Year of the Orthodox Church of the East, including the peculiar arrangement of the grouping of Sundays; and brief notices are given of the fasts and festivals of some of the separated Churches of the East. The questions concerning the determination of Easter will form the main trial of the patience of the student. The early controversies on the Paschal question are not free from obscurity; and the interests attaching to the construction of the various systems of cycles, intended to form a perpetual table for the unerring determination of the date of Easter, are mainly the interests which are awakened by the history of human ingenuity grappling more or less successfully with a problem which called for astronomical knowledge and mathematical skill. Religious interests are not touched even remotely. Profound as are the thoughts and emotions which cluster around the commemoration of the Lord’s Resurrection, they are quite independent of any considerations connected with the age of the moon and the date of the vernal equinox. The scheme for a time seriously entertained by Gregory XIII of making the celebration of Easter to fall on a fixed Sunday, the same in every year, has much to commend it. Had it been adopted we should, at all events, have been spared many practical inconveniences, and the ecclesiastical computists would have been saved a vast amount of labour. But we must take things as they are.