# On which day of the week were you born? **URL:** \ **Category:** In My Humble Opinion\ **Created:** [January 13, 2012, 3:46pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396 "2012-01-13T15:46:07Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![PandaBear77](https://avatars.discourse-cdn.com/v4/letter/p/edb3f5/32.png) [@PandaBear77](https://boards.straightdope.com/u/PandaBear77)\ **Post date:** [January 13, 2012, 6:01pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/21 "2012-01-13T18:01:07Z")
Caturdai ---
**Author:** ![Zeldar](https://avatars.discourse-cdn.com/v4/letter/z/b77776/32.png) [@Zeldar](https://boards.straightdope.com/u/Zeldar)\ **Post date:** [January 13, 2012, 6:05pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/22 "2012-01-13T18:05:44Z")
I wonder if things will get any tighter than this: ```auto Sunday 7 15.91% Monday 6 13.64% Tuesday 5 11.36% Wednesday 6 13.64% Thursday 7 15.91% Friday 7 15.91% Saturday 6 13.64% Voters: 44 ``` Wanna predict at what count of voters the days will all have the same number of votes? ---
**Author:** ![Leaffan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leaffan/32/299_2.png) [@Leaffan](https://boards.straightdope.com/u/Leaffan)\ **Post date:** [January 13, 2012, 6:07pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/23 "2012-01-13T18:07:05Z")
Yeah, well I’ve had “Lady Madonna” running through my head all morning because of this thread. So, I might as well answer now: Thursday. ---
**Author:** ![Tim\_R.Mortiss](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tim_r.mortiss/32/142_2.png) [@Tim\_R.Mortiss](https://boards.straightdope.com/u/Tim_R.Mortiss)\ **Post date:** [January 13, 2012, 6:07pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/24 "2012-01-13T18:07:09Z")
Looks pretty uniform to me. When we get up to 100 votes, I’ll do a Kolmogorov-Smirnoff test on it. ---
**Author:** ![Leaffan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leaffan/32/299_2.png) [@Leaffan](https://boards.straightdope.com/u/Leaffan)\ **Post date:** [January 13, 2012, 6:09pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/25 "2012-01-13T18:09:24Z")
> [@Tim\_R.Mortiss](#): > > Looks pretty uniform to me. When we get up to 100 votes, I’ll do a Kolmogorov-Smirnoff test on it. Gesundheit. ---
**Author:** ![Zeldar](https://avatars.discourse-cdn.com/v4/letter/z/b77776/32.png) [@Zeldar](https://boards.straightdope.com/u/Zeldar)\ **Post date:** [January 13, 2012, 6:10pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/26 "2012-01-13T18:10:27Z")
> [@Tim\_R.Mortiss](#): > > Looks pretty uniform to me. When we get up to 100 votes, I’ll do a Kolmogorov-Smirnoff test on it. Oh, please do! ---
**Author:** ![kayaker](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kayaker/32/441_2.png) [@kayaker](https://boards.straightdope.com/u/kayaker)\ **Post date:** [January 13, 2012, 6:11pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/27 "2012-01-13T18:11:52Z")
> [@Tim\_R.Mortiss](#): > > Looks pretty uniform to me. When we get up to 100 votes, I’ll do a Kolmogorov-Smirnoff test on it. I’ll do the Smirnoff, you do t’other. ---
**Author:** ![congodwarf](https://avatars.discourse-cdn.com/v4/letter/c/e36b37/32.png) [@congodwarf](https://boards.straightdope.com/u/congodwarf)\ **Post date:** [January 13, 2012, 6:47pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/28 "2012-01-13T18:47:27Z")
Sunday. ---
**Author:** ![Shagnasty](https://avatars.discourse-cdn.com/v4/letter/s/9dc877/32.png) [@Shagnasty](https://boards.straightdope.com/u/Shagnasty)\ **Post date:** [January 13, 2012, 7:08pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/29 "2012-01-13T19:08:46Z")
Friday June 15, 1973 at 5:52 pm CT. Funny, I still love Friday nights in the summer. ---
**Author:** ![Scubaqueen](https://avatars.discourse-cdn.com/v4/letter/s/c0e974/32.png) [@Scubaqueen](https://boards.straightdope.com/u/Scubaqueen)\ **Post date:** [January 13, 2012, 9:12pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/30 "2012-01-13T21:12:46Z")
Sunday, Father’s Day, \*\*\*and \*\*\*three weeks late. Mother always said I would be late for my own funeral some day. 😃 ---
**Author:** ![FairyChatMom](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/fairychatmom/32/21825_2.png) [@FairyChatMom](https://boards.straightdope.com/u/FairyChatMom)\ **Post date:** [January 13, 2012, 10:09pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/31 "2012-01-13T22:09:25Z")
> [@RTFirefly](#): > > As an alternative to the traditional rhyme, there’s the 1960s pop song “Saturday’s Child” performed by the Monkees. Here are the relevant parts: > > Monday had a sad child > Always feeling low down, > Tuesday had a dream child > She’s always on the go > > If you love a Wednesday > You’ll live your life apart now > And if you love a Thursday > She’s gonna break your heart > > Friday likes the good life > She’ll take you for a ride now > And Sunday makes a good wife > But she wants to be a bride > > Oddly, the song never states Saturday’s virtues, other than “she drives me wild” and she’s “got what it takes, babe. I can tell by the way she looks at me.” I’m Saturday’s child, and as it says by my username, I’m nice, dammit! 😃 This song was running thru my head before I even got to your post. I felt it was my personal anthem and Micky’s love song to me. Ah, youth… ---
**Author:** ![Tim\_R.Mortiss](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tim_r.mortiss/32/142_2.png) [@Tim\_R.Mortiss](https://boards.straightdope.com/u/Tim_R.Mortiss)\ **Post date:** [January 13, 2012, 10:12pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/32 "2012-01-13T22:12:17Z")
Okay, with 89 data points, here is the result of the Kolmogorov-Smirnoff test: Max absolute deviation: 0.059 Critical value: 0.144 Since the maximum absolute deviation does NOT exceed the critical value, we cannot reject the hypothesis that the data are uniformly distributed. ---
**Author:** ![Zeldar](https://avatars.discourse-cdn.com/v4/letter/z/b77776/32.png) [@Zeldar](https://boards.straightdope.com/u/Zeldar)\ **Post date:** [January 13, 2012, 10:16pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/33 "2012-01-13T22:16:55Z")
> [@Tim\_R.Mortiss](#): > > Okay, with 89 data points, here is the result of the Kolmogorov-Smirnoff test: > > Max absolute deviation: 0.059 > Critical value: 0.144 > > Since the maximum absolute deviation does NOT exceed the critical value, we cannot reject the hypothesis that the data are uniformly distributed. What a relief! They have wandered about plenty with varying high values, but never approaching the symmetry of the 44-vote checkpoint (that I have noticed, and I have been checking for such). I suspect we’ll have other smoothings along the way, as long as we keep getting votes. ---
**Author:** ![Inigo\_Montoya](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/inigo_montoya/32/124_2.png) [@Inigo\_Montoya](https://boards.straightdope.com/u/Inigo_Montoya)\ **Post date:** [January 13, 2012, 10:17pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/34 "2012-01-13T22:17:29Z")
Huh, Thursday. Who knew? ---
**Author:** ![Zebra](https://avatars.discourse-cdn.com/v4/letter/z/c0e974/32.png) [@Zebra](https://boards.straightdope.com/u/Zebra)\ **Post date:** [January 13, 2012, 10:27pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/35 "2012-01-13T22:27:41Z")
Monday? I hate Mondays. ---
**Author:** ![AClockworkMelon](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/aclockworkmelon/32/10803_2.png) [@AClockworkMelon](https://boards.straightdope.com/u/AClockworkMelon)\ **Post date:** [January 13, 2012, 10:29pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/36 "2012-01-13T22:29:40Z")
Wednesday! ---
**Author:** ![FrancisCastle](https://avatars.discourse-cdn.com/v4/letter/f/b4bc9f/32.png) [@FrancisCastle](https://boards.straightdope.com/u/FrancisCastle)\ **Post date:** [January 13, 2012, 10:34pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/37 "2012-01-13T22:34:12Z")
Today! Friday, I mean. 🙂 ---
**Author:** ![TriPolar](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tripolar/32/3008_2.png) [@TriPolar](https://boards.straightdope.com/u/TriPolar)\ **Post date:** [January 13, 2012, 10:37pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/38 "2012-01-13T22:37:21Z")
This is probably why I hate Mondays. ---
**Author:** ![chiroptera](https://avatars.discourse-cdn.com/v4/letter/c/df705f/32.png) [@chiroptera](https://boards.straightdope.com/u/chiroptera)\ **Post date:** [January 13, 2012, 10:54pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/39 "2012-01-13T22:54:55Z")
> [@RTFirefly](#): > > Or here’s a way you can calculate it in your head, if you know what day of the week your birthday is on this year (or in some other year): > > A given date advances X days through the cycle of the week between year A and year B, where X = (B-A) + (number of leap years - the number of February 29ths, actually - in between Year A and Year B). > > For instance, Christmas 2011 fell on a Sunday. In 1971, Christmas was on a Saturday. > > From 1971 to 2011 is 40 years, with 10 leap years. So Christmas moved 50 days around the week between 1971 and 2011. 49 =7x7, so the first 49 of those days move the date 7 times around the week and back to the same day as it started. The 50th day moves it 1 day forward. Flipping that around, that’s 1 day backward between 1971 and 2011, so Sunday in 2011 ==\> Saturday in 1971. > > Or today is January 13, 2012. It’s a Friday. What day of the week will January 13 fall on in 2042? > > 30 years + 8 leap years (why 8? I’ll get there) = 38 = 5\*7 + 3. So Jan, 13 goes five times around the week, plus 3 more days, so it’ll be on a Monday in 2042. > > Why 8 leap years? Because we have 7 leap years (2016, 2020, 2024, 2028, 2032, 2036, and 2040) in between, but we also count 2012 because what we’re really counting isn’t actually the leap year as a whole, but just the extra day on Feb. 29. And Feb. 29, 2012 is in the interval between Jan. 13, 2012 and Jan. 13, 2042. So we count it. > > Note: this works only between March 1, 1900 and February 28, 2100. Outside of those dates, one must adjust for the lack of a February 29 in either of those years. If you want to know what day a date falls on in A.D. 2101, when war was beginning, don’t count 2100 among your leap years. Years ending in 00 are leap years only if the number of centuries is divisible by 4: 2000, 2400, 2800, etc. That made my head hurt! Or, you could just google the date, which is what I did. Tuesday. ---
**Author:** ![Khadaji](https://avatars.discourse-cdn.com/v4/letter/k/9e8a1a/32.png) [@Khadaji](https://boards.straightdope.com/u/Khadaji)\ **Post date:** [January 13, 2012, 11:02pm UTC](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396/40 "2012-01-13T23:02:14Z")
I don’t know why I had it in my head it was a Friday, but as it turns out, I was right. [Previous page](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396.md?page=1) [Next page](https://boards.straightdope.com/t/on-which-day-of-the-week-were-you-born/609396.md?page=3)