It is a very pious act to bless the moon at the close of the Sabbath, when one is dressed in his best attire and perfumed. If the blessing is to be performed on the evening of an ordinary week-day the best dress is to be worn. According to the Kabbalists the blessings upon the moon are not to be said till seven full days after her birth, but, according to later authorities, this may be done after three days.
The reason for not performing this monthly service under a roof, but in the open air, is because it is considered as a reception of the presence of the Shechinah, and it would not be respectful so to do anywhere but in the open air. It depends very much upon circumstances when and where the new moon is to be consecrated, and also upon one's own predisposition, for authorities differ. We will close these remarks with the conclusion of the Kitzur Sh'lu on the subject, which, at p. 72, col. 2, runs thus: —