Court has discretion on time of the execution of search warrant

Dear PAO,

My brother was arrested after the police searched his house and found prohibited items mentioned in the search warrant. The search was conducted at midnight; thus, our relatives are claiming that the said search was illegal because a search warrant should be implemented during daytime. The police presented a search warrant issued by one of the courts in our province. May I ask if the police armed with a search warrant can just search a property any time they want?