The regulatory deadline require at least 21 days plus 4 business days before Meeting Date to send materials to beneficial holders (NI 54-101, section 2.12)
If utilizing Notice & Access, the material must be distributed at least 30 days before the meeting date, and material sent to intermediaries must be sent at least 33 or 34 days before the meeting date, depending on the mailing method to be used (NI 54-101 sections 2.9 and 2.12)