It consists of a group of calculators for specified needs for date and time calculations. A demo video is included in the package to illustrate the actual operations. The calculators are : 1. Date and time difference calculator. 2. Date in the future. 3. Date in the past. 4. Current date and time information. 5. Custom date and time information. 6. Custom date and time information with a calendar display. 7. A Stop watch. 8. A Stop watch with count up and count down ability. 9. The Times of major cities. 10. A custom watch with a calendar and a handy stop watch. 11. 12 clock faces.