DashClock is a very useful lock screen utility which provides notifications to a range of apps.
The left screenshot shows the appearance of DashClock for those who use a lock pattern, PIN, or password. Swiping down from the widget provides further detail, as seen in the centred image. By entering this view, you can also access the settings menus; just tap on the little gear/cog icon.
The general appearance of time and data can be altered via the settings.