What’s the most appropriate default year for a datepicker?

Let's say I have a datepicker and the purpose of this datepicker is very dynamic. It can be for date of a person's birth or graduation date, etc. What would be the most optimal default year for the datepicker in this case so it's easy to navigate to any date?

(I understand that the best datepicker for this case would just be a plain textbox, but we don't have the time to change the interface at this time.)