{{cleanup}}'''Old Calendarists''' are groups of Orthodox Christians who are in various levels of "resistance" against the mainstream Orthodox churches, identified mainly by their insistence on the use of the Julian calendar. They are to be distinguished from the mainstream churches which simply follow the [[Old Calendar]] yet remain in [[full communion]] with most or all of world Orthodoxy. Many Old Calendarists today say that their concerns about [[ecumenism]] are more significant than calendar issues.
'''The mainstream churches have varying positions on different Old Calendarists''' are groups of Orthodox Christians who are in various levels of "resistance" against the mainstream Orthodox Calendarist churches, identified mainly by their insistence on the use ranging from an active desire to restore unity to a denial of the Julian calendar. They are to be distinguished from the mainstream churches which simply follow the [[Old Calendar]] yet remain in communion with most of world Calendarists' Orthodoxy. Many Old Calendarists today say that their concerns about [[ecumenism]] are more significant than calendar issues.
Some Old Calendarist groups are styled as '''True Orthodox''' or '''Genuine Orthodox''', and both terms are used in this article.
