AuthentiDate Announces Earnings Date

    Business Editors

    SCHENECTADY, N.Y.--(BUSINESS WIRE)--May 10, 2005--AuthentiDate Holding Corp. (NASDAQ:ADAT) announced today that it would release financial results for it third quarter on May 16, 2005, immediately following the close of the regular trading session. In addition, the Company said that it would hold a conference call with members of the investment community at 4:30 p.m. ET on May 16, 2005.
    Based upon the timetable, the Company stated that it would file for a five day extension in order to provide its newly hired auditors additional time to review the quarterly results.
    The dial-in number for participants on the conference call is 800-811-8824 and 913-981-4903 for international callers. The conference code is 2350649. The call will also be web cast on the Company's website. To access the web cast, go to www.authentidatehc.com and click on the "Investors" link, then the "Audio archives" link and then the link for the web cast. An audio replay of the call will also be available until 5 p.m. CT on May 20, 2005. The replay dial-in number is 719-457-0820. The conference code is 2350649.

    About AuthentiDate Holding Corp.

    AuthentiDate Holding Corp. (AHC) is the holding company of three business units; the Security Software Solutions Group (AuthentiDate, Trac Medical and AuthentiDate International AG), the Document Solutions Group (Docstar) and the Systems Integration Group (DJS). The Security Software Solutions Group provides the authentication of digital data through its propriety and patent pending technology. This Group intends to establish itself as the authority on "content security" which we believe is a growing sector of the electronic network security infrastructure market. The Document Solutions Group sells proprietary document imaging software that includes the AuthentiDate technology. The Systems Integration Group delivers professional services centered around technology systems integration projects, staff augmentation, out-tasking, outsourcing services and resells computer related products.
    This press release contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Act of 1934. When used in this release, the words "believe," "anticipate," "think," "intend," "plan," "will be," "expect," and similar expressions identify such forward-looking statements. Such statements regarding future events and/or the future financial performance of The Company are subject to certain risks and uncertainties, which could cause actual events or the actual future results of the Company to differ materially from any forward-looking statement. Such risks and uncertainties include, among other things, the availability of any needed financing, the Company's ability to implement its business plan for various applications of its technologies, the impact of competition, the management of growth, and the other risks and uncertainties that may be detailed from time to time in the Company's reports filed with the Securities and Exchange Commission. In light of the significant risks and uncertainties inherent in the forward-looking statements included herein, the inclusion of such statements should not be regarded as a representation by the Company or any other person that the objectives and plans of the Company will be achieved.

--30--JS/na*

CONTACT: John A. Stiles & Associates, L.L.C. John A. Stiles, 314-994-0560

KEYWORD: NEW YORK INDUSTRY KEYWORD: COMPUTERS/ELECTRONICS HUMAN RESOURCES TELECOMMUNICATIONS SOFTWARE NETWORKING EARNINGS CONFERENCE CALLS SOURCE: AuthentiDate Holding Corp.

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