Enter any date after the year 1759 and find out what day of the week corresponding to that date!
You still think you need a calendar? With this application, you have access to thousands calendars, one for each calendar year! Still think you need the paper calendar or calendar on your operating system?
You can for example knowing the day of the week corresponding to 14/12/3000, It's a Sunday!
Use "find week days in mass" feature! It's the easily way of know faster the day of week...