Since they are currently 65, this means they have a 30 - year time horizon for their investments. (soundmindinvesting.com)
Let's consider someone with a 10 + year time horizon (a common situation for many people saving for goals such as retirement or college tuition for their children). (behavioralvalueinvestor.com)
I've purchased my position with a 5 year time horizon so I don't care too much about near term price fluctuations. (longtermvalue.wordpress.com)