Select a start date using a calendar interface
Enter the number of days to add or subtract
Switch between adding or subtracting days
Compute the new date based on inputs
Shows end date, weeks, and months between dates
Date arithmetic is a fundamental operation in various fields, from project management to financial planning. It involves manipulating date components (year, month, day) while accounting for varying month lengths and leap years. Modern programming languages often provide built-in date/time functionality to simplify these calculations, ensuring accuracy across different calendars and time zones.
The date calculation process involves these steps:
1. Retrieve the start date and number of days from user inputs
2. Create a new Date object from the start date
3. Use the addDays() method to increment or decrement the date by the specified number of days
4. Display the resulting end date
5. Calculate and show the number of weeks (days / 7) and months (days / 30) between the dates