Changes

It is eternal moving time that is concerned with the day/season/year. [Cha.Sa.[[Vimana Sthana]] 8/125] It is not only used by the medical fraternity but also by common people as a calendar.

It is eternal moving time that is concerned with the day/season/year. [Cha.Sa.[[Vimana Sthana]] 8/125] It is not only used by the medical fraternity but also by common people as a calendar.

The year (samwatsar or varsha) contains two ayana (solstitial movement of sun to north or south)

The year (samwatsar or varsha) contains two [[ayana]] (solstitial movement of sun to north or south)

a. Northward movement of sun (uttarayana or adana kala): Duration occurs when ascent of sun or northward movement of sun.

a. Northward movement of sun (uttarayana or adana kala): Duration occurs when ascent of sun or northward movement of sun.

b. Southward movement of sun (dakshinayana or visarga kala): Duration when sun descends or southward movement occurs.

b. Southward movement of sun (dakshinayana or visarga kala): Duration when sun descends or southward movement occurs.

Each of these ayana is divided into three seasons (ritu). Each ritu comprises two months (masa). Each masa has two fortnights (pakshas) – shuklapaksha and krishnapaksha, of 15 days each. This division is assumed as Lunar metrics.

Each of these ayana is divided into three seasons ([[ritu]]). Each [[ritu]] comprises two months ([[masa]]). Each masa has two fortnights (pakshas) – shuklapaksha and krishnapaksha, of 15 days each. This division is assumed as Lunar metrics.

[[File:Kala_Fig_1.JPG|500px|'''Image 1: Division of Kala in a year'''|thumb]]

[[File:Kala_Fig_1.JPG|500px|'''Image 1: Division of Kala in a year'''|thumb]]