Fourth, ninth and twelfth zodiac sign are taken as Sign of sat-Yuga, mostly influence by Jupiter and rahu,
First, fifth, eighth and eleventh zodiac are taken as Sign of Treta-Yuga influenced by the Sun , mars and the ketu,
Second third and Sixth zodiac Signs are taken as sign of Dwaper-yuga influence by the Moon and the Mercury,
Seventh and the tenth zodiac Sign are taken as the sign of Kali age influence by the Venus and the saturn where saturn rules the whip and it is kali age running now-Worship of Saturn in Kali age truly helps
May Lord Bless all,
Thanks Plaese