User:ManiacOfHomebrew/3DS 12-hour Clock

The 3DS uses the 24-hour time format to display the time on the HOME menu among other applets. This guide shows you how to convert the 3DS system's clock on the HUD of the Home Menu to a 12-hour format. This will not affect other applets such as System Settings or the Nintendo eShop at the moment.

This guide is based heavily on a custom HOME menu guide by Dungeonfire available here.

What You Need

 * The latest version of Home Menu Rebuilding Tool by DeKay
 * The latest version of MSBT Editor Reloaded
 * The latest version of GodMode9 installed
 * Windows - required for this guide currently, may not be in the future

Section I - Preparations

 * 1) Extract Home Menu Rebuilding Tool as well as MSBT Editor Reloaded to a new folder on your computer
 * 2) Press and hold Start, and while holding Start, power on your console. This will launch GodMode9
 * 3) Press HOME to bring up the action menu
 * 4) Select "Title manager"
 * 5) Select "[1:] NAND / TWL"
 * 6) Scroll down through the list and select a title labeled . This is the Home Menu application
 * 7) Select "Manage Title..."
 * 8) Select "Build CIA (standard)"
 * 9) Push A once it is finished
 * 10) Push R to power off the console
 * 11) Insert the SD Card into your computer
 * 12) Backup the  file in the   folder to a safe place on your computer. It ends with
 * 13) Make another copy of this  file in the folder created in step 1
 * 14) Rename it to

Section II - Modifying

 * 1) Open
 * 2) Push 8 on your keyboard
 * 3) Wait for it to finish, do not push any buttons. It should open a folder named ExtractedRomFS in a new window
 * 4) Keep the window open and open
 * 5) Drag the file named  from   into MsbtEditor
 * 6) Scroll down and select  in the list on the left
 * 7) Change  to   in the first text box labeled "Edit:"
 * 8) Push to save, then close MsbtEditor
 * 9) Go back to Home Menu Rebuilding Tool (the window you were instructed not to close) and push any key
 * 10) *If you accidentally closed it, reopen it, then push then  then

Section III - Installing

 * 1) Copy the outputted   file to the root of the SD card
 * 2) Press and hold Start, and while holding Start, power on your console. This will launch GodMode9
 * 3) Navigate to the   drive, then select the   file
 * 4) Select "CIA Image options..."
 * 5) Select "Encrypt file (...)"
 * 6) Select "Encrypt inplace"
 * 7) After it is finished, push A to continue
 * 8) Select the   file again
 * 9) Select "CIA Image options..."
 * 10) Select "Install game image"
 * 11) Press A to unlock SysNAND (lvl1) writing, then input the key combo given
 * 12) Push A twice then Start to reboot

If all has gone well, you should now see a 12-hour clock on the HUD of the HOME menu. If the HOME menu does not boot or you encounter any other problem, it is recommended that you ask for help on the Nintendo Homebrew Discord server in one of the 3DS assistance channels. You could also ping me, the person who wrote this guide (Username: _themaniac on Discord), there and I will assist you if possible.