Yes, there are options. If you happens to be outside the U.S or any of its territories, you can contact your nearest U.S social security office, U.S embassy or consulate. They'll help you out in that regard.
Does it matter, for benefit calculation purposes, if my birthday is January 1st?
If this is your birthday, we calculate your benefit as if your birthday was in the previous year
What information needs to be entered onto the detailed calculator?