Apparently there us a magic number.
If you gather more than XX people's bithdats, then there is a greater than 50% chance that 2 will have the samee birthday.
Who's willing to post their birthday to see if this works in practice?
cumfy
Thu 28-Feb-13 01:06:49
25 December
I think the thread "winner" should be the person who takes the last available date.
What post number will that be expected to be ?
And what are the chances it will be 29 Feb ?
toffeelolly
Thu 28-Feb-13 01:18:41
17th june , share my birthday with my dad!
Well my birthday hasn't come up. Nor dh's. Nor my 4 eldest children. But my youngest's has -- Beatrice, 22/9.
<irrelevant>
sneezingwakesthebaby
Thu 28-Feb-13 01:26:33
Mines already been pinched <shakes fist> 5th August!
ilovesooty
Thu 28-Feb-13 01:30:30
22nd January - always exactly 4 weeks after Christmas day.
My farher's birthday was the 21st and my mother's the 15th.
I share my birthday with a friend and a work colleague.
celebmum
Thu 28-Feb-13 01:38:59
Remotecontrolduck
Thu 28-Feb-13 02:46:33
30th Sept..... Christmas party accidents I reckon, I know five that share my birthday!
Alligatorpie
Thu 28-Feb-13 03:48:59
Getout - dd, my uncle and dh's best friend all share your bday. My cousin and i went into labour on the 23rd, dd was born at 1 am on the 24th, cousin's baby was born on the 26th.
Dbro and dsil share the same bday, even same year, but they were born on different continents.
Mine is Oct 30.
I havent seen mine. Oct 21 and they keep threatening to make it a public holiday, something I would be very glad of. Share a bday with my very long departed gran. I was her first grandchild so was a special birthday present for her 
Haven't seen mine yet - 21 January. Never met anyone else with my birthday either, but DH's best friend was born the day after me.
xMinerva
Thu 28-Feb-13 06:28:42
Haven't seen mine yet
2nd July.
Ds2's is 15th September. According to scans he was due on 17th September but I know exactly what day he was conceived. 
xMinerva
Thu 28-Feb-13 06:30:13
celebmum it's my mums birthday today as well.
<<looks suspiciously at you>>
MegGriffin
Thu 28-Feb-13 06:46:07
No one shares mine yet, 30 Jan.
I have never met anyone with the same birthday as me but I once replaced someone in a job who had my birthday apparently.
24th October - only met one other person who shared it - it's United Nations day dontcha know.
BelleDameSansMerci
Thu 28-Feb-13 07:29:02
25th September. Shared with various of DD's (12th Sept) friends. Oh, and Catherine Zeta Jones and Michael Douglas. 
toffeelolly
Thu 28-Feb-13 13:51:03
Three children 2Jan , 13March , 23May, Hubby's birthday 15Feb