Ceridian Corporation to Release Fourth Quarter 2005 Earnings Report

February 9, 2006

MINNEAPOLIS, February 9, 2006 - Ceridian Corporation (NYSE: CEN) will report its earnings for the fourth quarter of 2005 before the market opens on Wednesday, February 15, 2006.

A teleconference to discuss the results will be held at 9 a.m. EST on Wednesday, February 15, 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, chairman, 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 fourth quarter 2005 earnings teleconference.
DATE:	9 a.m. EST, Wednesday, February 15, 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, or directly at http://www.ceridian.com/corp/ir/1,2684,10941,00.html. A replay of the call will also be available at the same address beginning at 11 a.m. EST on Wednesday, February 15, 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.