Age 59.5 is missing
I am confused about the significance of ages 50, 55, 62, 65, 67, and 70 on my retirement planning.
Age 55 has some implications on using the SEPP withdraws from a traditional IRA. You won't see this age on IRS documents, but doing some math might suggest this age is important.
Age 59.5 is when you can withdraw penalty free from an IRA.
62-65-67 I would have to read up on, I am no where near those ages, not sure. SS withdraws can probably start at those ages, but it depends on year of birth for what age you can draw SS from.
age 70.5 is when you are required to take RMDs from traditional IRAs.