Setting Time Format to AM/PM from System Settings has no effect

[Stickles01]

Wingpanel shows time in 24hr format incorrectly, when attempting to toggle System Settings->Date & Time-> Time Format from AM/PM to 24h then back to AM/PM the time format doesn't update to reflect toggle., it stays in 24h format the entire time.

ProblemType: Bug
DistroRelease: elementary OS 0.3
Package: elementary-desktop 1.358+402~ubuntu0.3.1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CrashDB: elementary_meta
CurrentDesktop: Pantheon
Date: Mon Feb 2 20:08:14 2015
InstallationDate: Installed on 2015-01-25 (8 days ago)
InstallationMedia: elementary OS 0.3 "Freya" - Daily amd64 (20140810)
SourcePackage: elementary-meta
SuspiciousXErrors:

ThirdParty: True
UpgradeStatus: No upgrade log present (probably fresh install)

[janj (blackfed)]

Also here - changing from AM/PM to 24h from datetime shown in wingpanel has no effect.
Fresh installled Freya Stable 64bit.
Conky widgets show correct format 24h
System settings>date&Time shows correct 24h but wing panel still show AM/PM

SOLVED: system settings>Language&Region : language installation was not completed.

Did that and then installed my language (danish) and ticked the numbers and dates to be "danish" while keeping system settings "english".
Then log out/log in - result time is correct 24h

[janj (blackfed)]

Added: Login screen still shows AM/PM.
I guess its because system language is still english though Language & region>Numbers & dates is set to (Danish).
"Apply for login screen, guest account and new users" was triggered when I did that setting - but has had no effect.

Still, above description solved the main problem for me.

Pc is a HP compag 6000 pro SFF - some six years old. elementary lightning fast running..:)