Our Calendar

o certain periods adapted to the purposes of civi

f time are the solar day, the

ubdivisions of the day in

etween two consecutive returns of the same terrestrial merid

ference whatever to the celestial motions, a circu

tive new or full moons, and was used in the Roman calendar unti

rary number of days approaching a twelfth part of a year, a

Earth performs a revolution in its orbit about the sun or passes from any point of the ecliptic to the same

and varies among different nations, both in respect of t