I'm 99% sure that this is due to the cloud-init bug which messed up "UTC", in bug 1543025. Marking as a duplicate. If this still happens with current cloud images, please undup again.
I'm 99% sure that this is due to the cloud-init bug which messed up "UTC", in bug 1543025. Marking as a duplicate. If this still happens with current cloud images, please undup again.