I'd like to show a date range in a succinct way but also have it look good in other countries, are there any standards for formatting date ranges in other countries? So far for the US I've found that this seems the most correct...
Aug 2 - 9 2015
Aug 2 - Sept 15 2015
Aug 2 2015 - Jan 6 2016
This Wikipedia article should be what you're looking for.
A good chunk of the countries use DMY format (i.e. 2 August 2015), so using that would cover a pretty large amount of people. Quite a few also use the YMD format (i.e. 2015-8-2), however, and America uses the MDY format (i.e. August 2, 2015 or (less commonly) with an ordinal: August 2nd, 2015).
Also, each country differs in not only the order but the formatting as well. For example, some use only numbers, while some use the name of the month as well.
Luckily however, many programming languages and frameworks (such as Microsoft .NET and Java) have a built in formatter so that you don't have to format it by hand.
I couldn't find anything specifically about formatting date ranges in different cultures, though. However, the EN dash is made for use in ranges (see this answer).
Every computer has culture and lang settings that determine the date convention (either for short or long dates). For mobile, just show dates as users have configured in their phone settings. For web, you can show in the culture of the website, and that will be consistent with content.
Whatever you do, do not forget to include timezone if date range includes hours.
