A History of Indian Medical Literature v1.c23.26

v1.c23.26

The year is divided into two halves, called after the direction of the sun's course (ayana); the southern course (dakṣiṇāyana) covers varṣāḥ, śarad and hemanta, the northern course (uttarāyaṇa) śiśira, vasanta and grīṣma; the moon and the corresponding tastes are strong during the dakṣiṇāyana, the sun and the corresponding tastes during the uttarāyaṇa.³² The two ayanas together make one year; five years make one yuga. Some refer to this whole series of divisions of time as the kālacakra (wheel of time) (6.9).