Exhibit 99.1

  February 28, 2020    1500 Robert-Bourassa Blvd., 7th Floor
Montreal QC, H3A 3S8
www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: Aeterna Zentaris Inc.  

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type :	Annual Meeting
Record Date for Notice of Meeting :	April 1, 2020
Record Date for Voting (if applicable) :	April 1, 2020
Beneficial Ownership Determination Date :	April 1, 2020
Meeting Date :	May 6, 2020
Meeting Location (if available) :	Montreal, QC
Issuer sending proxy related materials directly to NOBO:	No
Issuer paying for delivery to OBO:	Yes
Notice and Access (NAA) Requirements:
NAA for Beneficial Holders	No
NAA for Registered Holders	No
Voting Security Details:

Description	CUSIP Number	ISIN
COMMON SHARES	007975402	CA0079754028

Sincerely,

Computershare  

Agent for Aeterna Zentaris Inc.