Karna vedha = Piercing the Ears
Muhurth is fixed in 2 steps shown as 2 rules tables below.
Karnavedha or piercing the ear. Although this was done originally only to beautify the child, it acquired the belief that it would protect the child against disease. Karnvedh. This Sanskar is performed in the firth or the seventh year or at the end of the first year with Chudkaram Sanskar.
| No. | Good | Avoid |
| 1 | Nak = Mrgasiras, Pushya, Punarvasu, Utthara, Uttharasadha, Uttarabhadrapad, Hast, Chitra, Asvini, Shravan, Dhanishta or Revati | Nak = Asvati, Bharani, Kartika, Rohini, Ayilyam, Magam, Pooram, Svati, Vishakam, Anisham, Thrikketta, Mulam, Pooradam, Poororuttati, Chatayam. |
| 2 | Day = Th, We, Mo, or Fr | Day = SU TU SA |
| 3 | Tithi = 2,3,5,6,7,10,12,13 | 4,9,14, amavasya,
S8 and K8 1st half of K7, S1 and P15 2nd half of K3,K10 and S11 |
| 4 | Shukla Paksh of Month = Karthik, Paush, Chaitra, or Phalgun | |
| 5 | In Kartik - after Shukla Dwadashi | |
| 6 | In Paush - after Sun enters Makar | |
| 7 | In Chaitra - after Sun enters Mesh |
| No. | Good | Avoid |
| 1 | Lag = Vrshab, Mithun, Meen, Kark, Kanya, Thula or Dhanu | Janma Maas or Adhika Maas |
| 2 | Lag = Mesh or Makar - 2nd choice | Lag = Simha, Vrichik, kumbh |
| 3 | 10, 12 or 16th day from birth | Lag = Rasi where sandhi of Nak / Tithi falls. |
| 4 | 6,7,8,10 or 12th month from birth | Mars in 8 |
| 5 | 3,5 or 7th year | Night |
| 6 | Madhyanham 10v | |
| 7 | Sayanham | |
| 8 | Any planet in 8th |