iCountdown

About iCountdown
Shows the difference in years, months, days, hours, minutes and seconds between today and a date of your choice. Using iCountdown is pretty straight-forward. Go to configuration (the widget’s back), set the target date (with second precision), press the Close button, and that’s all. Then, the widget front will show the remaining time, or an advice if the date have been reached.

Though you see the UI in Spanish, iCountdown supports English, Catalan and Spanish, always based on your locale.