Je n'avais pas vu la réponse.
Je viens de tester et rien à faire, j'ai toujours l'heure d'Europe :(

Code:
[zonemessages]
central=America/Chicago|'vm-received' Q 'digits/at' IMp
central24=America/Chicago|'vm-received' q 'digits/at' H N 'hours'
military=Zulu|'vm-received' q 'digits/at' H N 'hours' 'phonetic/z_p'
eastern = America/New_York|'vm-received' Q 'digits/at' IMp
european = Europe/Copenhagen|'vm-received' a d b 'digits/at' HM
et

Code:
911 => 1234,Cedric,cedric@domaine.com,tz=eastern