Deletion of Solar cycle (calendar)

Comment: The Julian Solar cycle is extensively covered in many reliable sources as it is one of the major components of the Julian calendar. For example it is discussed in books such as https://books.google.com/books?id=jlZBAAAAcAAJ&printsec=frontcover#v=onepage&q&f=false Universal Technological Dictionary: Or, Familiar Explanations of the Terms Used in All Arts and Sciences and https://books.google.com/books?id=4J0NAAAAQAAJ&pg=PA141&lpg=PA141#v=onepage&q&f=false Fasti temporis catholici, and Origines kalendariæ and authoritative websites such as http://www.timeanddate.com/calendar/julian-calendar.html Timeanddate.com and http://www.britannica.com/EBchecked/topic/89368/calendar/59345/Complex-cycles Britannica.  I can list more sources if you wish as there are thousands of references to it. This concept can be made into a complete article by itself by passing 
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG)