On The Other Hand, The Exact Time Of A Synodic Revolution Of The Moon Is 29'530588 Days; 235 Lunations, Therefore, Contain 2 35 X 29 530588 = 6 939'6 8818 Days, Or 6 939 Days 16 Hours 31 Minutes, So That The Period Exceeds 235 Lunations By Only Seven And A Half Hours.
As the /see' is longer than a synodic revolution of the moon, the sun cannot arrive twice at a chung-ki during the same lunation; and as there are only twelve tsee, the year can contain only twelve months having different names.
Long before the exact length of the year was determined, it must have been perceived that the synodic revolution.
The month, however, being a convenient period of time, has retained its place in the calendars of all nations; but, instead of denoting a synodic revolution of the moon, it is usually employed to denote an arbitrary number of days approaching to the twelfth part of a solar year.
The Months Now Consisted Of Twenty Nine And Thirty Days Alternately, To Correspond With The Synodic Revolution Of The Moon, So That The Year Contained 354 Days; But A Day Was Added To Make The Number Odd, Which Was Considered More Fortunate, And The Year Therefore Consisted Of 355 Days.