Ansible module to set timezone on hosts. DISCLAIMER: this is probably totally unportable and only tested on Debian 6.

timezone

#!/usr/bin/python
# -*- coding: utf-8 -*-

import time
import os
from subprocess import call

DOCUMENTATION = '''
---
module: timezone
short_description: Set timezone on host.
description:
     - The M(timezone) module sets the timezone on a host.
options:
  zone:
    description:
      - Timezone to set.
    required: true
    default: null
    aliases: []
examples:
   - code: "timezone: zone=UTC"
     description: "Set timezone to UTC"
author: Dennis Schoen <dennis@blogma.de>
'''


def main():
    module = AnsibleModule(
        argument_spec = dict(
            zone = dict(required=True)
        )
    )

    zone = module.params.get('zone')

    if time.tzname[0] == zone:
        module.exit_json(changed=False)
    else:
        os.unlink('/etc/localtime')
        os.symlink("/usr/share/zoneinfo/%s" % zone, '/etc/localtime')
        call(['/sbin/hwclock', '--systohc'])

        module.exit_json(changed=True)

# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>

main()