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?
toffeelolly
Thu 28-Feb-13 13:51:03
Three children 2Jan , 13March , 23May, Hubby's birthday 15Feb
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. 
24th October - only met one other person who shared it - it's United Nations day dontcha know.
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.
xMinerva
Thu 28-Feb-13 06:30:13
celebmum it's my mums birthday today as well.
<<looks suspiciously at you>>
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. 
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.
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 
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.
Remotecontrolduck
Thu 28-Feb-13 02:46:33
30th Sept..... Christmas party accidents I reckon, I know five that share my birthday!
celebmum
Thu 28-Feb-13 01:38:59
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.
sneezingwakesthebaby
Thu 28-Feb-13 01:26:33
Mines already been pinched <shakes fist> 5th August!
Well my birthday hasn't come up. Nor dh's. Nor my 4 eldest children. But my youngest's has -- Beatrice, 22/9.
<irrelevant>
toffeelolly
Thu 28-Feb-13 01:18:41
17th june , share my birthday with my dad!
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 ?
27 October
Please send flowers/chocolate/gin to the usual address
Chaos for your experiment does it help that I went the first 28 years of my life without meeting anyone with my birthday.
Then in 1.5 years met 4...
Sat next to a girl at work who shared it, then my colleague's DTs were born then and another colleague had that day too.....
CobOnTheCorn
Wed 27-Feb-13 20:14:18
Scarlet - 31 May here too.
redspottydress
Wed 27-Feb-13 20:11:57
At my wedding there were four of us with my birthday, my dh nanna and aunt with the same birthday and a niece and nephew with the same birthday. There may have been more, only 100 guests in total.
28th November, I was 2 weeks overdue so was induced. Meant to be born on my DM's birthday, 14th November (same as Prince Charles)- EXACTLY 9 MONTHS FROM VALENTINES DAY 
@ having a rough idea when Liz DTD
On the plus side, I share my birthday with William Blake and Mark from Big Fun
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