Having arrived from Bangkok at midnight, I went home and crashed.
The next morning the alarm on the phone woke me at 0730. As usual I hit the snooze button. Then a SMS came in from the boss asking me to go to the office that day instead of to another site an hour away. Happily I set the alarm for another 20 minutes sleep.
I woke at 0815 and proceeded to wash and dress. Then I went to the study to pack up the notebook to bring to work. There I saw the time as 0921hours.
Freaked out and started to rush. Then realised: I forgot to reset the time zone on the phone. DOH!