Fresh off the study, on the 1st day (of 24-day Tirthankara week); presenting the time keep Tree of Dharma:

Teen ratna (Three jewels) time keeps:

Samyak Jnan: Sirius A and B binary star system period, ~50 year cycle (Origo: Periastron, ask Bahubali)

Samyak Darsan: Pluto´s nodes 108 pada transit around Sun, ~24 000 year cycle (Origo: Pleiades left, as seen by naked eye)

Samyak Charitra: Moon´s nodes transit around Earth, 18,6 year cycle (Origo: last pada of Mesha/Aries, 27 nakshatra system)

V. Moon roll time keep:

Moon spin on it´s axis, 24 Earth orbit or 1 Solar spin cycle through the 27 Nakshatras (Origo: ? / when Moon´s face and Pleiades share the same angle of spirals)

VI. 24 Tirthankara Solar time keep:

Earth 24 longitudes passing sun in zenith time 24 hour cycle (Origo: Galapago East) 

VII. Sun-Sirius time keep (Yuga):

Sun´s and Sirius´ orbits around each other, which affects Earth´s axis (precession of the equinoxes, Pole star change), ~24 000 year cycle (Origo: 11 500 BC, middle of Sat Yuga)