Time and date formats are configurable, of course, and the widget exists in three sizes:
3x1: Shows time, date and week number
2x1: Shows time and date
1x1: Shows week number
Upon touching the time and date area, the widget _should_ launch the built-in alarm clock (or the app containing the alarm clock). But only if possible, of course. This should work on most phones.
Upon touching the week number area, the widget will launch the built-in calendar app, if possible.
Should you run into problems with the widget, and want to file a report, please send me an email instead of using the comments system, because I cannot reply to them.