May 29th is (apparently) National College Savings Day, the significance of which is that "5/29" refers to the college savings programs named after section 529 of the Internal Revenue Code. 529 plans are a tax-advantaged investment program designed to encourage saving for college. Parents can designate their beneficiary while retaining ownership of the money, and anyone can contribute to the plan. The best part is that the funds can later be withdrawn tax-free as long as they are used to pay for qualified educational expenses.
Two great sources to learn about 529 plans are this page on collegesavings.org and this one on finaid.org.