US DOL: Investor Bulletin: Target Date Retirement Funds
Target date funds, which are often mutual funds, hold a mix of stocks, bonds, and other investments. Over time, the mix gradually shifts according to the fund’s investment strategy. Target date funds are designed to be long-term investments for individuals with particular retirement dates in mind. The name of the fund often refers to its target date. For example, you might see funds with names like "Portfolio 2030," "Retirement Fund 2030," or "Target 2030" that are designed for individuals who intend to retire in or near the year 2030.