There are one set of twins that were born 87 days apart. One baby  was born on June 1, 2012. The next baby was born on August 26,  2012.
Not until you reach retirement age. Typically that's 65, though many pension plans allow you to start collecting early retirement benefits as early as age 55. If you decide to start receiving benefits before you reach full retirement age, the size of your monthly payout will be less than it would have been if you'd waited. Ask the folks who run your plan to create a simple table showing you how your payments will vary depending on when you start.
If you start your CPP at age 60, the amount is reduced for each year you are younger than 65. From 2012 to 2016, the Government of Canada is gradually changing the early pension reduction from 0.5% to 0.6% for each month you receive it before age 65.f you start your CPP after age 65, your monthly payment amount will increase by 0.7% for each month that you delay receiving it, up to age 70. This means that an individual who starts receiving their CPP retirement pension at the age of 70 will receive 42% more than if they had taken it at 65.