Thinking this was simply that my windows locale was set to US I double checked but as expected it was showing correctly as United Kingdom. This was for both the account that I was logged on as and the account the vCenter service was started with. When checking the same events in the thick GUI client the format is showing correctly:
After a twitter conversation with Graham French the issue could be with a tomcat config file that could potentially be set to a US locale somewhere. I've trawled both Google and the VMware KB site for anything referencing this and have so far came up with nothing. I've checked as many config files as I can but just can't seem to find anything relating to this. If anyone can shed any light on this I'd be much appreciated.
I spent countless hours looking through log files to try and find the default locale and then I suddenly remembered a KB article I read a while back about changing the language in the web client. It then suddenly dawned on me that I should try the following: