Good news: With so many people adding years to their birthdays to bump up LJ's statistics, LJ has now added an option to display only month and day of your birthday without the year (even if you have entered the year).
Bad news: In so doing, they changed everyone's preferences to not display the birthday at all, even if you previously chose to display it.
Go to
http://www.livejournal.com/manage/profile/ to set the option the way you want it.
Via ladysorka via
daily_snitch