how can i find someone birthday for free online?
141890
it depends on the person that you are looking for because it will be pretty hard to find it online unless you ask someone.
1040371
http://www.zabasearch.com
1116148
Anywho.com gives you an address and phone number for free, if you know what state they live in. I've found many old friends this way. Hopefully once you find some of them, they will help you find others.
173281
Try Classmates.com, Reunion.com or one of the free people search engine.  Be careful if you pay to on some of those engines because I read the info on the person is outdated on some engines.
872277
zabasearch.com\n\nhttp://www.zabasearch.com/\n\nthis is the best!!!\n\n\nalso try www.classmates.com\n\n\n\nhttp://www.classmates.com/\n\n\ngood luck!!!
187557
Try the-seeker.com and friend-find.com. These are free. You can both post messages and search for his name.
781337
Try www.friendsreunited.
98153
if you know the name and city they live in, then try just typing it in google... i did that earlier and it brought up the person's full address and phone number.  this may not be available for all people though...
23124
Just go to http://people.yahoo.com/ and type in their name.
517208
I can only think of http://www.whitepages.com where you can enter their name or address and get their phone numbers. Or you can check myspace.com to look for people through networks or maybe even http://www.classmates.com\n\nThats of course assuming the people you are looking for uses the internet.
770944
Try searching for the person you are looking for at http://spaces.live.com/
1069662
try zabasearch.com. its free and guaranteed to work.
604225
zabasearch.com and anywho.com, both free. \nAncestry.com and reunion.com, not free. I do believe I have a couple other sites bookmarked, when and if I find them I will post again.
44568
Use the Ultimate People Finder on knowx.com. It's free. Click on the Standard Page for the option. You can search all states or just a specific one.\n\nGood luck!
345820
http://zabasearch.com/
794549
yahoo people search or zabasearch.com
85044
Visit http://people.yahoo.com/ and search his name.