Calendar for Months between Year 1899 to Year 2101

A fully functional calendar for months between Year 1899 to Year 2101. The user can change Month and/or Year from the respective dropdown lists or by clicking the increment/decrement buttons next to them. To-day's date is always marked with a different background color. The user can mark a particular date by clicking on it - the marked date remains the same although its position may change after changing the month pages.