# Let's see how many days of the year we can fill with Doper Birthdays. **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [October 7, 2005, 9:47pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244 "2005-10-07T21:47:32Z")\ **Posts on this page:** 20\ **Page:** 16
**Author:** ![Arwin](https://avatars.discourse-cdn.com/v4/letter/a/51bf81/32.png) [@Arwin](https://boards.straightdope.com/u/Arwin)\ **Post date:** [October 11, 2005, 3:04pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/301 "2005-10-11T15:04:40Z")
> [@MrFantsyPants](#): > > July 23rd is mine. And add me for 23rd of June. ---
**Author:** ![Martha\_Medea](https://avatars.discourse-cdn.com/v4/letter/m/43a26b/32.png) [@Martha\_Medea](https://boards.straightdope.com/u/Martha_Medea)\ **Post date:** [October 11, 2005, 6:59pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/302 "2005-10-11T18:59:18Z")
> [@August West](#): > > Hi **Martha!** Have a great birthday on friday, because it’s my birthday too! > > October 14, 1972 > > It is also my anniversary, I’ll be celebrating 5 years of wedded bliss and 33 years of life on 10/14/2005. Happy Birthday and Anniversary to you too, **August**! I’ll raise a glass to you. My sister got married on _my_ birthday, and I got married on hers, so it makes it easy for us to remember each other’s anniversaries. If I think about it, it could also be used as a hinting device aimed at forgetful husbands. ‘Darling, it’s my sister’s birthday on Friday. Did you hear me? My **sis-ter’s birth-day** ’. She didn’t choose the date deliberately. I did. The wedding was a secret and we wanted to suprise the family with the announcment via a phone call. Without arousing suspicion, I phoned a couple of days before and asked what they were all going to be doing for my sister’s birthday and where they would be, so that I could call and wish her a happy birthday. ---
**Author:** ![Antigen](https://avatars.discourse-cdn.com/v4/letter/a/848f3c/32.png) [@Antigen](https://boards.straightdope.com/u/Antigen)\ **Post date:** [October 11, 2005, 7:45pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/303 "2005-10-11T19:45:50Z")
October 16 Feel free to send presents. 🙂 ---
**Author:** ![Sean\_Factotum](https://avatars.discourse-cdn.com/v4/letter/s/50afbb/32.png) [@Sean\_Factotum](https://boards.straightdope.com/u/Sean_Factotum)\ **Post date:** [October 11, 2005, 7:48pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/304 "2005-10-11T19:48:09Z")
Well **May 9th** is still open as of the last update, so I’ll claim that. ---
**Author:** ![UncaStuart](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/uncastuart/32/404_2.png) [@UncaStuart](https://boards.straightdope.com/u/UncaStuart)\ **Post date:** [October 11, 2005, 7:57pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/305 "2005-10-11T19:57:21Z")
November 18 ---
**Author:** ![cher3](https://avatars.discourse-cdn.com/v4/letter/c/da6949/32.png) [@cher3](https://boards.straightdope.com/u/cher3)\ **Post date:** [October 11, 2005, 8:16pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/306 "2005-10-11T20:16:52Z")
I don’t think anyone’s taken May 18 yet. That’s mine. ---
**Author:** ![Jackknifed\_Juggernaut](https://avatars.discourse-cdn.com/v4/letter/j/9de053/32.png) [@Jackknifed\_Juggernaut](https://boards.straightdope.com/u/Jackknifed_Juggernaut)\ **Post date:** [October 11, 2005, 8:20pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/307 "2005-10-11T20:20:28Z")
February 22 ---
**Author:** ![sishoch](https://avatars.discourse-cdn.com/v4/letter/s/3e96dc/32.png) [@sishoch](https://boards.straightdope.com/u/sishoch)\ **Post date:** [October 11, 2005, 8:26pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/308 "2005-10-11T20:26:08Z")
June 5 open? I’ll cover it. ---
**Author:** ![wonderlust](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wonderlust/32/7237_2.png) [@wonderlust](https://boards.straightdope.com/u/wonderlust)\ **Post date:** [October 11, 2005, 8:30pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/309 "2005-10-11T20:30:28Z")
Mine’s still empty: April 12 ---
**Author:** ![Cowgirl\_Jules](https://avatars.discourse-cdn.com/v4/letter/c/4af34b/32.png) [@Cowgirl\_Jules](https://boards.straightdope.com/u/Cowgirl_Jules)\ **Post date:** [October 11, 2005, 9:00pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/310 "2005-10-11T21:00:36Z")
You don’t have mine: 8 June. ---
**Author:** ![wolfstu](https://avatars.discourse-cdn.com/v4/letter/w/d6d6ee/32.png) [@wolfstu](https://boards.straightdope.com/u/wolfstu)\ **Post date:** [October 11, 2005, 9:07pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/311 "2005-10-11T21:07:37Z")
5 April, for me. ---
**Author:** ![World\_Eater](https://avatars.discourse-cdn.com/v4/letter/w/f04885/32.png) [@World\_Eater](https://boards.straightdope.com/u/World_Eater)\ **Post date:** [October 11, 2005, 9:18pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/312 "2005-10-11T21:18:55Z")
Happy birthday **Paperblob**! 🙂 ---
**Author:** ![Encinitas](https://avatars.discourse-cdn.com/v4/letter/e/ee7513/32.png) [@Encinitas](https://boards.straightdope.com/u/Encinitas)\ **Post date:** [October 11, 2005, 9:25pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/313 "2005-10-11T21:25:56Z")
September 28th! ---
**Author:** ![Idle\_Thoughts](https://avatars.discourse-cdn.com/v4/letter/i/838e76/32.png) [@Idle\_Thoughts](https://boards.straightdope.com/u/Idle_Thoughts)\ **Post date:** [October 11, 2005, 10:13pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/314 "2005-10-11T22:13:14Z")
**Mr bus guy,** but are they actually members here? I may, like the Location thread, start a new denotation (Heh, is that a word? Well, it is now) for family of Doper’s birthdays (In fact, I will, I’m saying it now, but not right now) at a later time, but for right now, I kinda only want to keep it for actual members who are regestered. Unless, buswife and buskid are members here? In that case, I’ll add them. However, in about another 2 or 3 days or so, I will make a color coded extra for all family members of Dopers. 🙂 Same to, **ShibbOleth** , if you can get her to regester, then I’ll add her (plus the more on here, the merrier!) 🙂 **Random Stats:** **Day with the most birthdays so far: July 29th has 5 Month with the most birthdays so far:** July has 30 **Month with the least birthdays so far:** April only has 17 **Number of days of the year so far:** 206 **Number of days still needed:** 160 Biggest “run” in a row so far:\*\* 9 (December 11th - 19th) _January_ 1st- Athena, supervenusfreak, Nancarrow 3rd- BlackKnight, Madd Maxx 5th- Honey 6th- Ravenman 9th- Small Clanger 13th- A.R. Cane 14th- Diceman 18th- saramamalana 19th- DiosaBellissima 20th- NurseCarmen 21st- ladyfoxfyre, gommsn 23th- dalej42 25th- Rhiannon8404 29th- Governor Quinn, Elza B. _February_ 2nd- Happy Lendervedder 3rd- Mona Lott 4th- romansperson 5th- Hampshire 7th- Hal Briston 8th- The Sausage Creature 11th- coop 12th- percypercy 13th- Rhythmdvl 14th- Cat Jones 16th- Aholibah 17th- Little Bird 19th- Enright3 20th- mikeargo 21st- stargazer 22nd- OliverTwistofLime, Jackknifed Juggernaut 23rd- ryobserver 25th- Craneop2 28th- Stillwell Angel \*March \* 1st- Kyyrewyyoae 4th- FilmGeek 7th- The Mad Hermit 8th- Sierra Indigo 11th- faithfool 12th- LoganDear 14th- straykat23 15th- TwoTrouts 16th- nonacetone, Jennshark 19th- Nymphadora, AuntiePam 20th- metj 22nd- CWN 24th- Mrs. Franchi 25th- Cerri 29th- ultrafilter 30th- Brilharma 31st- Rockwell, MrsMonkey _April_ 1st- Astroboy14 5th- wolfstu 10th- SeeNoReason, elfkin477 11th- Waenara, Buckler of Swashing 12th- brightpenny 16th- Susie Derkins, Penchan, irishgirl 20th- AngelicGemma 23rd- BayleDomon 24th- jsgoddess 25th- percussion 26th- runner pat 28th- BrattiAtti, ZipperJJ \*May \* 1st- Avarie537, PinkMarabou 3rd- chimichanga 6th- sneezy5660, Jpeg Jones 9th- Sean Factotum 10th- Khadro 11th- ErinPuff 12th- Art Vandelay, Architect 14th- Good Egg 15th- Nic2004 16tg- Cub Mistress 18th- cher3 19th- Marley23 21st- robotic\_panda 24th- scr4 25th- Cunctator, MissTake 26th- LavenderBlue, Atheist Princess 27th- liberty3701 29th- Kilvert’s Pagan 31st- fruitbat _June_ 1st- ENugent, Ragiel 3rd- Miabella 2nd- Loach 4th- Demo 5th- sishoch 6th- Ponster 7th- Anastasaeon, Carm6773 8th- Cowgirl Jules 11th- mhendo 12th- Johnny L.A. 13th- Pixel 14th- Balle\_M 15th- Shagnasty 16th- Epimetheus 18th- GorillaMan 22nd- Inigo Montoya 23rd- Arwin 24th- Barracuda 25th- Long Time First Time 26th- 1920s Style “Death Ray”, hillbilly queen, MsRobyn \*July \* 1st- newcrasher, photopat 2nd- Taran 5th- Starlite, trublmakr 6th- World Eater, Absolute, mkl12 11th- pulykamell 12th- eleanorigby 14th- Enginerd, Waterman 15th- Landshark, ShibbOleth 16th- Antonius Block 17th- Mr. Goob 18th- Kythereia 19th- gfloyd 20th- Emilio Lizardo 23rd- MrFantsyPants 24th- Dung Beetle 29th- Ayesha, Bear\_Nenno, Ejs Girl, Kyla, Swambear 31st- Bird Man, Yeticus Rex, Vunderbob, krisolev _August_ 1st-moonstarssun, BraheSilver 2nd- Ninja Chick 3rd- Meaty Beaty Big and Bouncy, Mint Julep 4th- Suburban Plankton, Hokkaido Brit 8th- AntaresJB, pudytat72 10th- Ice Wolf 12th- Mighty Girl, Butterscotch 18th- psycat90 19th- Grasshopper 21st- StarvingButStrong, Ludy, KJ 22nd- Hilarity N. Suze, akira5822 24th- Mr. Blue Sky 27th- Faruiza, Tamryne 28th- interface2x 30th- Sternvogel, cherry, Monstre 31st- VenusProbe _September_ 2nd- BitternessComesStandard 6th- bobkitty 8th- Lsura 9th- vivalostwages 12th- jrfranchi 13th- XWalrus2 14th- Johanna 16th- The Flying Dutchman, feppytweed 17th- Miss Violaceous 18th- WallFlower 20th- Canadiangirl, racer1 21st- Misnomer 23rd- Spikesbud 28th- TellMeI’mNotCrazy, Harimad-sol, Encinitas 29th- Crafter\_Man 30th- Blalron, anyrose _October_ 1st- Eleusis, fishbicycle 3rd- racer72 5th- Nutty Bunny 6th- Manatee, Otanx 7th- malkavia, ltfire 8th- LaurAnge 10th- danceswithcats, Ellen Cherry 11th- PaperBlob 12th- Stinkum 14th- Martha, August West 15th- Ms Macphisto 16th- BadBadger, Antigen 18th- Smashed Ice Cream 19th- Spongemom 22nd- Hentor the Barbarian 26th- Gail 31st- seosamh, dangermom _November_ 2nd- Harborwolf 3rd- jackelope 4th- Sassy 5th- YaWanna 6th- BwanaBob 7th- melondeca 10th- movingfinger, norinew 11th- EvilAsh 13th- marque elf, Jman 14th- Voyager 16th- Pyroette 17th- chrisk 18th- UncaStuart 20th- cat39645 22nd- Idle Thoughts 23rd- BiblioCat 26th- KSO, WhyNot 27th- DirtyHippy 30th- Noone Special, infamousmom, Anaamika _December_ 1st- Khadaji, Marconi & Schmeese, CalMeacham 2nd- Snakescatlady 4th- Zeldar, Mishell 9th- Misery Loves Co. 11th- PookahMacPhellimey 12th- Rushgeekgirl, Twoflower 13th- betenoir 14th- Corporate Hippie 15th- Lady Venom 16th- csharpmajor 17th- mr bus guy, detop 18th- PinkNailFile 19th- Clothahump 22nd- Pandora 23th- PigBoy 24th- dare\_devil007\_ 25th- Kat, Annie-Xmas 27th- MissGypsy 28th- amarone, picker 29th- dinahmoe ---
**Author:** ![marque\_elf](https://avatars.discourse-cdn.com/v4/letter/m/71c47a/32.png) [@marque\_elf](https://boards.straightdope.com/u/marque_elf)\ **Post date:** [October 11, 2005, 10:59pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/315 "2005-10-11T22:59:52Z")
Statistically it supposedly works out that in any group of 30 people, 2 will have the same birthdate. The first place I heard this was _Let’s Make A Deal_, perhaps not the most reliable of sources. Later I heard from a more reliable source. I never took statistics so I wouldn’t understand the math but intuitively this doesn’t seem right to me. Your odds for any specific birthday are only 1 in 365/366. Why does the probability drop down to 1 in 1 when 30 people are present? Each birthday is a random event. Shouldn’t then the probability be 1 in 365 times 2 times 30? That doesn’t equal 1 in my book. Can any explain to me why this is so? We have had 206 respondents for 160 days. That may not equal 1 in 365 but it is not far off from it either. ---
**Author:** ![jsc1953](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@jsc1953](https://boards.straightdope.com/u/jsc1953)\ **Post date:** [October 11, 2005, 11:09pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/316 "2005-10-11T23:09:11Z")
I just jumped to the last page to see if you need me, and you do: July 10. ---
**Author:** ![Odinoneeye](https://avatars.discourse-cdn.com/v4/letter/o/97f17d/32.png) [@Odinoneeye](https://boards.straightdope.com/u/Odinoneeye)\ **Post date:** [October 11, 2005, 11:11pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/317 "2005-10-11T23:11:27Z")
Add me on to Nov. 27. I’m pretty sure there’s at least one more on here. I’m thinking it’s Shirley Ujest. ---
**Author:** ![hajario](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/hajario/32/171_2.png) [@hajario](https://boards.straightdope.com/u/hajario)\ **Post date:** [October 11, 2005, 11:38pm UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/318 "2005-10-11T23:38:08Z")
> [@marque elf](#): > > Statistically it supposedly works out that in any group of 30 people, 2 will have the same birthdate. Not exactly. If you have a group of 23 people, it is more likely than not that at least two of the 23 have the same birthday. The easiest way to calculate this is to take 23 people and calculate the odds that none of the 23 have the same birthday. My stats book is too dusty and in a way to inconvenient place for me to do anything but leave the rest as an exercise to the reader. ---
**Author:** ![ladybug](https://avatars.discourse-cdn.com/v4/letter/l/46a35a/32.png) [@ladybug](https://boards.straightdope.com/u/ladybug)\ **Post date:** [October 12, 2005, 12:22am UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/319 "2005-10-12T00:22:03Z")
> [@Khadro](#): > > May 10 Me too! I have a Doper twin. 🙂 ---
**Author:** ![slai](https://avatars.discourse-cdn.com/v4/letter/s/49beb7/32.png) [@slai](https://boards.straightdope.com/u/slai)\ **Post date:** [October 12, 2005, 12:36am UTC](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244/320 "2005-10-12T00:36:46Z")
October 13 [Previous page](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244.md?page=15) [Next page](https://boards.straightdope.com/t/lets-see-how-many-days-of-the-year-we-can-fill-with-doper-birthdays/325244.md?page=17)