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Is it possible to customize the format in which Android displays the current date?

I'm interested mainly in:

  1. the date format at the top on screen when pulling down the notification menu (currently for me, it's "DD/MM/YYYY")
  2. The date format at the lock screen (currently for me, it's "Weekday, D Month")

I would like to have all dates displayed in ISO 8601 format, YYYY-MM-DD. The global date format can be changed from settings, but the only available options are MM/DD/YYYY, DD/MM/YYYY and YYYY/MM/DD, and it seems there's no way to define a completely custom date format or set - as a custom field separator. This also doesn't affect the lock screen.

I'm using a rooted Android 2.2 (Froyo) with Samsung TouchWiz 3.0. I'm also insterested in answers that require CyanogenMod or other custom ROMs.

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Isn't it that for the date in the Notification bar, you can simply change it in the Settings -> Date and Time -> Date Format? However, I have no idea about the Lock Screen format change. –  SamSPICA Apr 16 '12 at 7:14
    
Running CM7 here. (This is Android 2.3 but should apply to 2.2 as well; I'll check on my Replicant phone a little later tonight.) I've set the System date format to ISO 8601. The status bar & lock screen haven't changed. –  Broam Apr 16 '12 at 14:23
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@SamSPICA There are only three options available, and no way to customize. Sorry for not being clear enough, I added more details to the question. –  Ilari Kajaste Apr 16 '12 at 15:51
    
@Broam, thanks for the information! –  Ilari Kajaste Apr 16 '12 at 18:48
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Unbelievable. Of all people, Google don't know about the international date format. Even on iPhone one can set it.. –  Pavel Radzivilovsky May 14 '13 at 21:06
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1 Answer

The Notification Bar uses the global date format. So, just switch to the desired format from Settings ~> Date and time ~> Select Date Format.

For the lock screen, use a lock screen app. Search the Play Store, you can find many.

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You can only select three different options from the settings, no way to customize. I provided more details to the question to make it more clear. –  Ilari Kajaste Apr 16 '12 at 15:52
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I assume from the second part of your answer that there is no way to change the built-in lock screen format? (I generally try to avoid installing apps unless I'm sure there's use for them.) –  Ilari Kajaste Apr 16 '12 at 15:54
    
@Ilari Then, there's no way to do this.. :( sorry! –  Sachin Shekhar Apr 16 '12 at 17:11
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