To change the timezone of your account navigate to the upper right hand corner to select the menu icon and choose Settings
From the General page select the timezone that applies to you, then you can also select the format of the displayed date including the following options:
mm/dd/YYYY
dd/mm/YYYY
YYYY/mm/dd
An option is also included to Observe Daylight Savings Time - this should be selected if your area does observe that. (Please note that the daylight savings begin and end date are based on the US schedule of the second Sunday in March, to the first Sunday in November)