My system: Linux Mint 14 Nadia // 3.5.0-17-generic (x86_64) // Cinnamon 1.6.7
I have been battling with this on my new install for weeks now, and can not find an entirely acceptable option. Customization of the date/time format displayed is a deal breaker for me when dealing with any computer interface, and I find that the lack of easy customization in an OS such as Linux to be quite surprising and disappointing. Linux can do some amazing things... but we can't customize the way the system date and time is displayed? Really? In Windows or OS X, the OS has always allowed system wide customization of the displayed date and time format, and it takes seconds to change to the desired format. Is Linux really still so primitive that we can't do this with ease? The display of non ISO-8601 date and time formats as a default is not just annoying and a source of confusion, but downright offensive. LOL.
After playing with MATE, Cinnamon and Unity in Ubuntu 12.04 I have found that the current version of LM and CInnamon allow for the most customization easily through the GUI. The date and time format can be customized in three or four locations. Preferences > Date and Time
Here 24H vs AM/PM can be selected.Preferences > Cinnamon Settings > Calendar
In which one can entirely customize edit the date and time format for the clock and calendar in the panel. I wish this could be applied system wide, but this is actually still dependent on the language of the Locale.Open Nemo (the File explorer) > Edit > Preferences > Display
For the file explorer Windows only, ISO-8601 format date is one of 3 options that can be selected.
At this point, it appears that we have customized everything but in actuality, this is only a surface fix. The core OS date and time is still displayed based on the locale. This can be viewed in System Information
. If you are using en_US for the locale, you will still get a horrendously awkward date format, as well as a AM/PM 12 hour time display. Any program that displays date/time based on the system locale will display the same.
For example Thunderbird will display mail using this long and awkward date format in the date received column. I really don't have that much screen real estate to want to deal with a column that long.
For Thunderbird I used the Super Date Format add-on to fix this:https://addons.mozilla.org/en-US/thunderbird/addon/super-date-format/
But this only applies to the date received column. Inside the header of the message the system date/time is displayed. The root problem still exists, all the above fixes just cover it up. It would be easiest to just be able to create a custom locale with the desired date/time and language formatting. I have attempted this and despite numerous attempts on three different OS builds I have always failed.
Several articles and forum posts exist about this, none of which have an option that works for current buildshttp://ubuntuforums.org/showthread.php?t=1159293https://help.ubuntu.com/community/Localehttp://askubuntu.com/questions/200974/how-can-i-set-the-date-format-to-my-country-settinghttp://ubuntuforums.org/showthread.php?t=1973896
Editing the en_US file does not work. Creating a custom locale based on en_US does not work. Every time I attempted this not only was I not able to prevent the system from displaying the default times, I ended up breaking the language support panel to the point where it would not work even after being removed and reinstalled. At one point in Ubuntu I even forced removal of all the locales from the system except for the custom locale with the settings I wanted. Magically, the system still managed to display the standard en_US settings, even though there was no source of these settings! But, my lack of understanding of the basics of Linux may have led to the defeat at all the hacking here.
One last desperate work around:Preferences > Language Support > Regional Formats
This is the only way to actually modify the way the core system keeps date and time formatting, but there is no ISO-8601 compliant variant. The closest is the en_DK
locale that can be used to display time as 2012-12-09T 12:19:01, but I am not a fan of the European style swapping of commas and decimals in long numbers. Currently I am trying the Chinese (Singapore)
setting for this as numbers are displayed the same and date is displayed as 2012年12月09日. This only takes a little more space than the ISO format, but this is only tolerable to me because I am familiar enough with the language for this to not be unintelligible.
Surely a functioning custom locale package can be created and installed through the GUI without breaking anything?? Of all the Linux Mint and Ubuntu users out there, surely someone managed to get this to work? Please share if you have.