Different Thithis And Ruling Planets are as follows :
1) Prathamai - Sun
2) Thuvithiai - Moon
3) Thiruthiai - Mars
4) Chathurthi - Mercury
5) Panchami - Jupiter
6) Sashti - Venus
7) Sapthami - Saturn
8) Ashtami - Rahu
9) Navami - Sun
10) Dasami - Moon
11) Ekadasi - Mars
12) Thuvatasi - Mercury
13) Thiruyodasi - Jupiter
14) Chaturthasi - VEnus
15) Fullmoon/Paurnami - Saturn
Thirtieth day is called as amavasya/amavasai/new moon the auspicious day for starting anything new- Rahu
1) Prathamai - Sun
2) Thuvithiai - Moon
3) Thiruthiai - Mars
4) Chathurthi - Mercury
5) Panchami - Jupiter
6) Sashti - Venus
7) Sapthami - Saturn
8) Ashtami - Rahu
9) Navami - Sun
10) Dasami - Moon
11) Ekadasi - Mars
12) Thuvatasi - Mercury
13) Thiruyodasi - Jupiter
14) Chaturthasi - VEnus
15) Fullmoon/Paurnami - Saturn
Thirtieth day is called as amavasya/amavasai/new moon the auspicious day for starting anything new- Rahu
