How to manage the reply header locale of Thunderbird

If you use Thunderbird of the Japanese version when you create a reply message, you will see:

On 2008年08月15日 23:45, XYZ@com wrote:

However this is not convenient to write English messages because readers cannot display Japanese characters.

So we can set followings into prefs.js:

user_pref("mailnews.reply_header_locale", "en-US"); user_pref("mailnews.reply_header_ondate", "On %s"); user_pref("mailnews.reply_header_authorwrote", "%s wrote"); user_pref("mailnews.reply_header_type", 2);

Then, you will obtain the header:

On 08/15/2008 11:45 PM, XYZ@com wrote: