A three day notice has to provide three days to pay. So giving him notice on Saturday for payment on Sunday does not provide three days notice. Also, the three day period does not include Saturdays, Sundays or legal holidays.
No attorney-client relationship is created by answering questions in this public forum. If you wish to create an attorney-client relationship, you must contact me directly, not through this public forum. Answers are provided based on general ideas and an answer specific to your situation would require a review of all documents.