Many thanks for responding to Adiyen’s query (Q28CHIT21006) on shaving. I was confused: Initially, it was explained that shaving must not be done during the months of Adi, Margahzi, and Maci; but later it was said that shaving can be done during the first half of Adi and the second halves of Margazhi and Maci; further, there was no mention about Sundays. Kindly clarify my confusion.

Shaving must not be done during the months of Adi, Purattasi, Margazhi, and Maci.
According to a statement – ‘danush kumbhau’, that is shaving can be done during the second halves of Margazhi and Maci and the first half of Adi.
There is also a statement that says one must not shave during the entire month of Purattasi.
If these cannot be adhered to, it is still a practice of the elders to include the statements above in their anusthanam. No need to get confused. Always the scriptures will show alternate ways in case one is not able to follow a prescribed method.
Shaving can be done on Sundays as long as any tainted tithi and star is not associated with that Sunday.
Notes:
If possible, it is preferred not to shave during the months of Adi, Purattasi, Margazhi and Maci.
Some might not be able to follow this; for those people, as an alternative, they can shave during the first halves of Margazhi and Maci and second half of Adi.