CloudFoundry Timezone - timezone

Question

I have developed an application which is very (JodaTime) DateTime centric (calendar and so on). Locally at my computer all works fine. I have deployed my app at cloudfoundry and there no dates are visible in the calendar.
I guess that this has something to do with the timezone of cloudfoundry. I have connected my locally running application to the mongodb database in the coud and everything works find.
My question now would be how to change timezone at cloudfoundry to CEST (MEZ)?
Thanks a lot!

Answer 1

Your Java application is going to run in a Linux container, so you can use any Linux or Java method of setting the timezone.
The easy ones that come to mind...
cf set-env <app-name> TZ 'America/Los_Angeles'
cf restage <app-name>
or
cf set-env <app-name> JAVA_OPTS '-Duser.timezone=Europe/Sofia'
cf restage <app-name>
The first should be generic to any application that respects the TZ environment variable. The second is specific to Java.
If you don't want to use cf set-env you could alternatively set the environment variables via your manifest.yml file.

Answer 2

To expand on #DanielMikusa. (Great Answer)
SAMPLE MANIFEST:
applications:
- path: .
buildpack: nodejs_buildpack
memory: 128M
instances: 1
name: sampleCronJobService
health-check-type: process
disk_quota: 1024M
env:
TZ: Etc/Greenwich
CF_STAGING_TIMEOUT: 15
CF_STARTUP_TIMEOUT: 15
TIMEOUT: 180
SuperSecret: passwordToTheWorld
WHY I KNOW IT WORKS:
var date = new Date();
var utc_hour = date.getUTCHours();
var local_hour = date.getHours();
console.log('(Timezone) Local Hour: ' + local_hour + ' UTC Hour: ' + utc_hour);
Prints: (Timezone) Local Hour: 23 UTC Hour: 23
If I set the manifest to have TZ: America/Los_Angeles
It Prints: (Timezone) Local Hour: 16 UTC Hour: 23