Naming a child is one of the duties laid on parents. According to the report of Samurah which was related by At-Tirmidhi, the Prophet said, “A child is mortgaged by his `aqiqah; slaughtering should be done for him on the seventh day, he should be given a name, and his head should be shaved.”

The hadith is graded as authentic. The default rule is that all names are permissible, but it is disliked that a person picks a bad name for his child.

The Prophet has been reported as changing some of his Companions names for this reason. He has been also reported as saying, “The names dearest to Allah are ‘Abdullah and ‘Abd al-Rahman.” (Muslim).

There is no merit or a reward or a statement of the Prophet to confirm that one should name his child according to the name of the day or the month. As long as we do not have an authentic evidence from the Qur’an or Hadith to support this practice, it is a restriction of what Allah has made spacious and permissible for us. It may be labeled as an act of innovation if a person does it out of thinking that it is a meritorious act.