July 24, 2006

MINNEAPOLIS, July 24, 2006 - Ceridian Corporation (NYSE: CEN) will report its earnings for the second quarter of 2006 before the market opens on Thursday, July 27, 2006.

A teleconference to discuss the results will be held at 9 a.m. EDT on Thursday, July 27, 2006. Investors are invited to listen to the teleconference live through the Investor Relations section of Ceridian's website at www.ceridian.com.

Ronald L. Turner, president and chief executive officer, and Douglas C. Neve, executive vice president and chief financial officer, will present the results for the quarter.

SUMMARY:
WHAT:	Ceridian Corporation's second quarter 2006 earnings teleconference.
DATE:	9 a.m. EDT, Thursday, July 27, 2006.
HOW:	Investors can listen to a webcast of Ceridian's earnings conference call by visiting the Investor Relations section of Ceridian's website at www.ceridian.com. A replay of the webcast will also be available at the same address beginning at 11 a.m. EDT on Thursday, July 27, 2006.

Ceridian Corporation (www.ceridian.com) is an information services company serving businesses and employees in the United States, Canada and Europe. Ceridian is one of the top human resources outsourcing companies in these markets, and offers a suite of innovative managed business solutions, including payroll, tax filing, application outsourcing, time and attendance, benefits administration, HR information systems, and employee effectiveness services. Through its Comdata subsidiary, Ceridian is a major payment processor and issuer of credit cards, debit cards and stored value cards, primarily for the trucking and retail industries in the United States.