[uf-discuss] Suggestion for Birthday

[Jonas]

The bday field is a problem since that many users want not enter the
year. OpenID [1] solved it so:

date of birth as YYYY-MM-DD. Any values whose representation uses
fewer than the specified number of digits should be zero-padded. The
length of this value MUST always be 10. If the End User user does not
want to reveal any particular component of this value, it MUST be set
to zero.
For instance, if a End user wants to specify that his date of birth is
in 1980, but not the month or day, the value returned SHALL be
"1980-00-00".

So the developers could let enter any of these options: "YYYY" (for
year), "YYYY-mm" (year-month) or "mm-dd" (month-day), and a complete
date.

[1] http://openid.net/specs/openid-simple-registration-extension-1_1-01.html