# Noteworthy day

**URL:** <https://boards.straightdope.com/t/noteworthy-day/654933>\
**Category:** The Game Room\
**Created:** [April 5, 2013, 5:18pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933 "2013-04-05T17:18:40Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 5, 2013, 5:18pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/1 "2013-04-05T17:18:40Z")

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Interesting day, today. There hasn’t been one like it for nearly 26 years, since June 1987. In a similar vein, about three weeks from now there will be a day that we haven’t seen the like of for over fourteen years.

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**Author:** ![Prof.Pepperwinkle](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/prof.pepperwinkle/32/13627_2.png) [@Prof.Pepperwinkle](https://boards.straightdope.com/u/Prof.Pepperwinkle)\
**Post date:** [April 5, 2013, 5:20pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/2 "2013-04-05T17:20:39Z")

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Okay, I’ll bite. How so?

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**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 5, 2013, 5:23pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/3 "2013-04-05T17:23:16Z")

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I leave that as an exercise for the reader.

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**Author:** ![madsircool](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/madsircool/32/3432_2.png) [@madsircool](https://boards.straightdope.com/u/madsircool)\
**Post date:** [April 5, 2013, 5:29pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/4 "2013-04-05T17:29:10Z")

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452013 im guessing

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**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:** [April 5, 2013, 5:31pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/5 "2013-04-05T17:31:00Z")

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5/4/13?

4/5/13?

2013/4/5?

5/4/2013?  
Nope. No matter how I slice it, I don’t see the noteworthiness.

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**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:** [April 5, 2013, 5:32pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/6 "2013-04-05T17:32:30Z")

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> [@madsircool](#):
>
> 452013 im guessing

😕

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**Author:** ![PacifistPorcupine](https://avatars.discourse-cdn.com/v4/letter/p/7ea924/32.png) [@PacifistPorcupine](https://boards.straightdope.com/u/PacifistPorcupine)\
**Post date:** [April 5, 2013, 5:38pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/7 "2013-04-05T17:38:58Z")

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No digits repeat?

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**Author:** ![hogarth](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/hogarth/32/1773_2.png) [@hogarth](https://boards.straightdope.com/u/hogarth)\
**Post date:** [April 5, 2013, 5:45pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/8 "2013-04-05T17:45:50Z")

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> [@PacifistPorcupine](#):
>
> No digits repeat?

And it has all the digits from 0 to 5. Although I’m not sure how that ties in with June 5, 1987 which has the digits from 5-9 with an extra 1.

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**Author:** ![LawMonkey](https://avatars.discourse-cdn.com/v4/letter/l/d6d6ee/32.png) [@LawMonkey](https://boards.straightdope.com/u/LawMonkey)\
**Post date:** [April 5, 2013, 9:27pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/9 "2013-04-05T21:27:01Z")

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On this day, 14 k of g were placed in a f p d.

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**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 8, 2013, 3:19pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/10 "2013-04-08T15:19:09Z")

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> [@PacifistPorcupine](#):
>
> No digits repeat?

Correct. 6/30/1987 (or 30/6/1987, it makes no difference) was the last such date.

Using the mm/dd/yyyy or dd/mm/yyyy format, none of us will be around to see the next one.

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**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:** [April 8, 2013, 3:39pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/11 "2013-04-08T15:39:28Z")

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> [@Ximenean](#):
>
> Correct. 6/30/1987 (or 30/6/1987, it makes no difference) was the last such date.
> 
> Using the mm/dd/yyyy or dd/mm/yyyy format, none of us will be around to see the next one.

How is today, 4/8/2013, any different then?

Did you learn this on Facebook? From the same person who told us last July would be the last month in a gazillion years with five Fridays?

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**Author:** ![Jas09](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Jas09](https://boards.straightdope.com/u/Jas09)\
**Post date:** [April 8, 2013, 3:40pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/12 "2013-04-08T15:40:28Z")

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I don’t get it:

4/5/2013 - doesn’t repeat any digits, OK.

Doesn’t today - 4/8/2013 have the same feature?

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**Author:** ![Tom\_Scud](https://avatars.discourse-cdn.com/v4/letter/t/f08c70/32.png) [@Tom\_Scud](https://boards.straightdope.com/u/Tom_Scud)\
**Post date:** [April 8, 2013, 3:46pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/13 "2013-04-08T15:46:53Z")

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> [@Jas09](#):
>
> I don’t get it:
> 
> 4/5/2013 - doesn’t repeat any digits, OK.
> 
> Doesn’t today - 4/8/2013 have the same feature?

Sure. No-repeat days will be common through the end of the 2010’s (after which there won’t be any for another decade, due to the 2 2); but there weren’t any in 1988, 1989, the 1990s, the 2000s, 2010, 2011, or 2012 just due to the digits in the year. 4/5/2013 is the first day in 2013 that doesn’t have a 1, 2, 3, or repeated 4 in it.

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**Author:** ![Jas09](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Jas09](https://boards.straightdope.com/u/Jas09)\
**Post date:** [April 8, 2013, 3:53pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/14 "2013-04-08T15:53:07Z")

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OK, but then what does:  
[QUOTE=Ximenean]  
Using the mm/dd/yyyy or dd/mm/yyyy format, none of us will be around to see the next one.  
[/QUOTE]  
mean?

Oh! I just got his point, I think. If you count the 0’s in 04/05/2013 then we won’t see a no-repeater in a very long time. Of course in that form 06/30/1987 doesn’t count either.

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<div class="post-metadata">

**Author:** ![Jas09](https://avatars.discourse-cdn.com/v4/letter/j/d07c76/32.png) [@Jas09](https://boards.straightdope.com/u/Jas09)\
**Post date:** [April 8, 2013, 3:54pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/15 "2013-04-08T15:54:07Z")

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But I guess 06/25/1987 does, right?

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**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:** [April 8, 2013, 3:55pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/16 "2013-04-08T15:55:36Z")

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> [@Jas09](#):
>
> But I guess 06/25/1987 does, right?

And a bazillion others.

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<div class="post-metadata">

**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 8, 2013, 3:57pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/17 "2013-04-08T15:57:52Z")

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> [@Jas09](#):
>
> But I guess 06/25/1987 does, right?

06/25/1987 was the last one. The next one is a long time from now.

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**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:** [April 8, 2013, 4:03pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/18 "2013-04-08T16:03:50Z")

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09/23/1987

For example.

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<div class="post-metadata">

**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 8, 2013, 4:04pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/19 "2013-04-08T16:04:36Z")

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> [@Leaffan](#):
>
> How is today, 4/8/2013, any different then?
> 
> Did you learn this on Facebook? From the same person who told us last July would be the last month in a gazillion years with five Fridays?

I learnt it from my own calculations, prompted by a question in the excellent TV show “Only Connect”. It’s a mathematical curiosity, which I thought would make an interesting puzzle. So I posted it in the forum where puzzles go. Sorry if it offended you.

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<div class="post-metadata">

**Author:** ![Ximenean](https://avatars.discourse-cdn.com/v4/letter/x/aca169/32.png) [@Ximenean](https://boards.straightdope.com/u/Ximenean)\
**Post date:** [April 8, 2013, 4:12pm UTC](https://boards.straightdope.com/t/noteworthy-day/654933/20 "2013-04-08T16:12:48Z")

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> [@Leaffan](#):
>
> 09/23/1987
> 
> For example.

That has two "9"s in it. We’re down to bazillion minus one.

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