ADP to Webcast Third Quarter Fiscal 2013 Earnings Release Conference Call on May 3, 2013

ADP to Webcast Third Quarter Fiscal 2013 Earnings Release Conference Call on
May 3, 2013

ROSELAND, N.J., March 21, 2013 (GLOBE NEWSWIRE) -- Automatic Data Processing,
Inc. (Nasdaq:ADP) is scheduled to release its financial results for the third
fiscal quarter ending March 31, 2013 before the opening of the Nasdaq on
Friday, May 3, 2013.

ADP also will be hosting a conference call at 8:30 a.m. EDT on May 3, 2013 to
discuss the results for the quarter. Carlos A. Rodriguez, president and chief
executive officer, Jan Siegmund, chief financial officer, and Elena S.
Charles, vice president of investor relations, will be participating on the
call.

Investors and interested participants are invited to listen to the conference
call and view the accompanying slide presentation via live webcast.The
webcast can be accessed through ADP's home page, www.adp.com, or ADP's
Investor Relations home page, http://www.investquest.com/InvestQuest/a/adp/.
Please note, this webcast will be broadcast in two streams: Windows Media and
Flash. You may switch streams by selecting "Windows Media" or "Flash" from the
gear-setup symbol located to the right-hand side of the volume control on the
webcast player.Please check your system 10 minutes prior to the webcast. In
addition, the slide presentation will be available to download and print
approximately 60 minutes before the webcast at ADP's Investor Relations home
page.A replay of the webcast will be available for approximately two weeks
after the event and can be accessed in the same manner as the live webcast.

ADP^® (Nasdaq:ADP), with more than $10 billion in revenues and approximately
600,000 clients, is one of the world's largest providers of business
outsourcing and human capital management solutions. Leveraging over 60 years
of experience and a global footprint spanning more than 40 countries, ADP
offers a wide range of human resource, payroll, talent management, tax and
benefits administration solutions from a single source, and helps clients
comply with regulatory and legislative changes, such as the Affordable Care
Act (ACA). ADP's easy-to-use solutions for employers provide superior value to
companies of all types and sizes. ADP is also a leading provider of integrated
computing solutions to auto, truck, motorcycle, marine, recreational vehicle,
and heavy equipment dealers throughout the world. For more information about
ADP or to contact a local ADP sales office, reach us at 1.800.225.5237 or
visit the company's Web site at www.adp.com.

CONTACT: ADP Investor Relations
         973.974.5858