Chicago ? Through a combination of procrastination and bad timing, many baby boomers are facing a personal finance disaster just as they’re hoping to retire.

Starting in January, more than 10,000 baby boomers a day will turn 65, a pattern that will continue for the next 19 years.

The boomers, who in their youth revolutionized everything from music to race relations, are set to redefine retirement. But a generation that made its mark in the tumultuous 1960s now faces a crisis as it hits its own mid-60s.

“The situation is extremely serious because baby boomers have not saved very effectively for retirement and are still retiring too early,” says Olivia Mitchell, director of the Boettner Center for Pensions and Retirement Research at the University of Pennsylvania.

There are several reasons to be concerned:

• The traditional pension plan is disappearing. In 1980, some 39 percent of private-sector workers had a pension that guaranteed a steady payout during retirement. Today that number stands closer to 15 percent, according to the Employee Benefit Research Institute in Washington, D.C.

• Reliance on stocks in retirement plans is greater than ever; 42 percent of those workers now have 401(k)s. But the past decade has been a lost one for stocks, with the Standard & Poor’s 500 index posting total returns of just 4 percent since the beginning of 2000.

• Many retirees banked on their homes as their retirement fund. But the crash in housing prices has slashed almost a third of a typical home’s value. Now 22 percent of homeowners, or nearly 11 million people, owe more on their mortgage than their home is worth. Many are boomers.