Hi, you can change this by logging into the Sellathon site and editing your 'my preferences' along with date format, time zone etc.
However you can only do this during the trial period or when a subscription is paid for, when either expire the settings default to the initial state when you started your free trial.
By default all the stats you see via the counter on your listing are public and you may not want everybody see them, that foolled me until I saw another post here.
You can select which to privatise via your 'my preferences', however they go public again if your subscription expires. I do not like that aspect
Also to cancel your susbcription you have to do it at PayPal it is like a UK standing order from a bank but from PayPal.
Hope this helps.