Fluff - Why does the USA date things M/D/Y

From Wikipedia:

Gregorian, day-month-year (DMY)

This little-endian sequence is common to the majority of the world's countries. This date format originates from the custom of writing the date as "the 8th day of November in the year of our Lord 2003" in Western religious and legal documents. The format has shortened over time but the order of the elements has remained constant.

"8 November 2003" or "8. November 2003" (the latter is common in German-speaking regions)
8/11/2003 or 08.11.2003 or 8-11-2003
08-Nov-2003
08Nov03 – Used, even in the U.S., where space needs to be saved by skipping punctuation.
[The] 8th [of] November 2003 (The 'of' and 'the' may be included in speech; they are generally omitted in all but the most formal writing.)
08/Nov/2003 - used in the Common Log Format
Sunday, 8 November 2003
8/xi/03, 8.xi.03, 8-xi.03, or 8.XI.2003 (using the Roman numeral for the month) – This is usually confined to handwriting only and is not put into any form of print. It is associated with a number of schools and universities. It has also been used by the Vatican as an alternative to using months named after Roman deities. It is used on Canadian postmarks as a bilingual form of the month.
8 November 2003 CE or 8 November AD 2003

Gregorian, year-month-day (YMD)

In this format the most significant data item is written before lesser data items i.e. year before month before day. It is consistent with the big-endianness of the Indian decimal numbering system, which progresses from the highest to the lowest order magnitude. That is, using this format textual orderings and chronological orderings are identical. This form is standard in Greater China, Iran, Japan, South Korea, Belgium, Lithuania, Hungary and Sweden; and some other countries to a limited extent.

Examples for the 9th of November 2003:

2003-11-09: the standard Internet date/time format,[1] a profile of the international standard ISO 8601, orders the components of a date like this, and additionally uses leading zeros, for example, 0813-03-01, to be easily read and sorted by computers. It is used with UTC in RFC 3339. This format is also favoured in certain Asian countries, mainly East Asian countries, as well as in some European countries. The big-endian convention is also frequently used in Canada, but all three conventions are used there.[2]
2003 November 9
2003Nov9
2003Nov09
2003-Nov-9
2003-Nov-09
2003-Nov-9, Sunday
2003. november 9. – The official format in Hungary, point after year and day, month name with small initial. Following shorter formats also can be used: 2003. nov. 9., 2003. 11. 9., 2003. XI. 9.
2003.11.9 using dots and no leading zeros, common in China.
2003.11.09
2003/11/09 using slashes and leading zeros, common in Internet in Japan.
20031109 : the "basic format" profile of ISO 8601, an 8-digit number providing monotonic date codes, common in computing and increasingly used in dated computer file names. It is used in the standard iCalendar file format defined in RFC 5545.

It is also extended through the universal big-endian format clock time: 9 November 2003, 18h 14m 12s, or 2003/11/9/18:14:12 or (ISO 8601) 2003-11-09T18:14:12.
Gregorian, month-day-year (MDY)

This sequence is used primarily in the United States. This date format was commonly used alongside the little-endian form in the United Kingdom until the mid-20th century and can be found in both defunct and modern print media such as the London Gazette and The Times, respectively. In the United States, it is said as Sunday, November 9, although usage of "the" isn't uncommon (e.g. Sunday, November the 9th, and even November the 9th, Sunday, are also possible and readily understood).

Sunday, November 9, 2003
November 9, 2003
Nov. 9, 2003 or 11/9/2003
11-9-2003, 11.9.2003, 11.09.03, or 11/09/03

The modern convention is to avoid using the ordinal (th, st, rd, nd) form of numbers when the day follows the month (July 4 or July 4, 1776); though this was common in the past, and the ordinal is still sometimes used (4 July or July 4).

mdy seems logical to me.  the date is a way to place events.  when you start by saying the month it takes your mind to a specific place on the calendar.  if you start with the day your mind has nowhere to go.  naming the day, say, 24, takes your mind to the 24th of what month?  its almost like not getting any information at that point.  saying the month first gives you a specific starting location in your head.

You'd manage if you'd grown up elsewhere   

Actually many do say 27 May. 

Because I say it is January 22nd, not the 22nd of January. It seems totally weird that you write it that way you do.

I always just assumed it was because that's the way you say the date. Like, "today is January 22, 2015" so 1/22/2015.

I like the computer/programmer way, though. No room for confusion.

I think the only day we say the day first instead of the month is the 4th of July. Otherwise I always say the month first.

I only ever say 22nd January. I use 24hr clock as well as 12 hour clock. I used to fly a lot and all timings were in 24hr clock. When I write a time in my diary I usually write in 24hr form. It's natural to me, I don't need to do the Math (now there's another thread, Math versus Maths)

With regard to measurements, I use inches and centimetres equally, I have been known to say that something is 20cm long and 4" wide! I know my height in both feet and inches and metres and centimetres. For distances I use miles, but I can roughly convert to kilometres. For cooking I use grammes and millilitres. I would never use pounds and ounces. I occasionally use cup measurements because I received some really cute Russian Doll cup measurers as a present

ETA I guess they're called measuring cups ?

I've said many times, you might get me to convert to metric but there's no farkin' way I'm switching to day/month/year. So confusing. 6/7/12. June or July??

That's why it makes sense to me to do DDMMYY, smallest to largest. My brain likes things in an orderly fashion!   When I organise things like files or photo folders I do the reverse - largest to smallest - YYMMDD. That way the files are always in order from the start of the year to the end. 

This thread reminds me of my trip to Hawaii with a couple of girlfriends when we were 21yo. One girl turned 21 on 6th April, we were in Hawaii in late May. We went to a club and the guy on the door wasn't going to let my friend in because her ID showed her birthdate as 6-4-68. He read it as 4th June not 6th April. It took quite some convincing before he finally let us in. I had to explain that we do our dates differently and showed him my ID which showed 22-9-67 as proof.

I never weigh myself in stone, always in kilograms. When I was a teenager I was familiar with stone, probably because my parents and their generation used it, but these days I have no idea how much 10 stone would be. People in the US just use pounds rather than stone and pounds don't you?

Are there other countries besides the US that also follow this logic?

Maybe YOUR spoken English, but not mine!  Here we say 27th of May, 16th of October, 4th of July. I don't think I've ever said it the other way.

The funny thing is, most people in this country (the people I know anyway) still prefer to measure babies weights in pounds and ounces! The hospital measures in grams but more often than not people will say "How much is that in pounds?" Very weird seeing than no-one uses pounds for anything else. For example, my DD was 3295g at birth, but to people it made more sense to say 7lb 4oz. Go figure! But if you said to the same person "I weigh 120 pounds (I wish!), they would say "How much is that in kilos?"   Pounds only works for babies. 

ETA: Sorry, the "cal" in valincal should have given me a hint that you are Canadian!!