1331499 - Thunderbird Daily 53.0a1.en-US.win64 forces 12-hour a.m./p.m.

Status: RESOLVED DUPLICATE of bug 1308329

(Thunderbird :: Untriaged, defect)

Description

[Gregory Czapla]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0
Build ID: 20161210195403

Steps to reproduce:

Download and install new Thunderbird Daily 53.0a1.en-US.win64.exe in Win7 x64 Ultimate.  Opening Thunderbird Daily x64 shows received mail time as 12-hour AM/PM.  Neither logging off, restarting Windows, or starting Thunderbird Daily x64 in safe mode resolves this.  Purging the caches doesn't resolve this.  I then install the January 7, 2017 version and opening it immediately upon finishing shows 24-hour time, no logging off, restarting, purging etc. necessary.


Actual results:

Mail received date and time shows date with time forced to 12-hour AM/PM.  My system is set for 24-hour time (I am in the USA in the CST zone and use 24 hour time).  Windows Updates have been steadily applied and have not been responsible for the issue.


Expected results:

Should be displaying in 24-hour time.  Last time this worked correctly was with the January 7, 2017 file version and had worked correctly previously for several years with only twice having 12-hour forcing within recent memory (within the past 2 months), which was resolved with the next day's release.  Each day's version since Jan 7 now has forced 12-hour AM/PM without exception.  I have tried the "Super Date Format" extension but would prefer the release not use this.

Comment 1

[Jorg K (CEST = GMT+2)]

I knew that this bug would be reported. This is a fallout from bug 1301640.

Please note that after landing of bug 1301640, the date and time format on Windows is determined exclusively by the Windows "format locale" which you can set under "Control Panel > Region and Language, Formats". Individual modifications applied to the "format locale" are ignored.

So if you use "English (United States)", you will be forced to 12h format. If you use English (United Kingdom)" (like myself), you get 24h time, but also DD/MM/YYYY.

Mozilla will fix this issue in due course, but I wouldn't hold my breath. See bug 1308329 (and bug 1325751). I'm sorry I can't give you any better news.

Perhaps you can find a locale that gives your US date format with 24h time. If you do, let us know.

And thanks for being on the Daily channel, it's sometimes a very bumpy ride. Yes, the date changes got landed on the 24th, then backed out and then re-landed and are now permanent.