Why did settlers ask for my birthday?

[DiabloKitten]

I'm curious, has anyone else been asked the same when logging in with facebook.

[matie2506]

i am not sure:confused:

[Wieteke]

They will have a surprise party for you...oops now I spoiled the surprise....bummer ;)

[peck_ed]

I imagine it's to understand who they're working with