Show year of birth - I'd expect my age to be shown (although it's hard to decipher age from years).
Show month/day - I'd expect to see my birthday without the year
Agreed.
I've always considered showing the year to be dependent on showing the month/day, as over time you effectively reveal your DOB via your age.
I was actually interested in showing just my age or year of birth, but not my full DOB. Kind of disappointed that I wasn't able to do that, I was even about to report it as a bug, but found this thread. Like said above, they most likely won't know my date and month of birth unless they stalk me, that is, visit my profile everyday. If they happen to do so then I can live with that.
Currently it seems a bit misleading since if a label says "Show year of birth" you'd think it would, well, show your year of birth. Underneath that particular checkbox it even says, "This will allow people to see your age." So there are two signs indicating that your age will show, but it doesn't...
Assuming someone's birthday is Dec. 28, 1991, I would expect these results:
"Show day and month of birth" checked -
December 28
"Show year of birth" -
1991 (and/or
Age: 20)
Both options checked:
Dec. 28, 1991 (Age: 20)
Both options unchecked: Nothing Shown
If it is insisted that it continue to work the way it is, then doesn't it make more sense for the show year of birth checkbox to automatically select the first checkbox as well, or either having that option disabled by default and only enabled when the first checkbox is checked, since selecting the checkbox by itself doesn't do anything.