Add Days to Date Calculator

How to add Calendar Days to a date using Javascript?

To Add days to a given date

• Create date with given start date in string format start Date = new Date(start date in string);

• 0 means same day, -1 previous day, +32 goes into next month and adds remaining days of that month.

• To subtract, pass -ve value and the days will be computed

• The return value of the set Date is time in milliseconds format

• Convert the timestamp to readable text format

How to add work days or business days to a date?

• Find number of weeks - assuming 5 business days, find the number of weeks

  Number of days / 5 = weeks

  Take whole part for weeks and remainder part for days

  Number of days % 5 = remainder days

  week count = truncate (number of days / 5);

  day count= number of days % 5;

• Multiply by 7 to get actual calendar days use that to add to the start date

  days to add = weekCount * 7 + dayCount;

• Get the day information. If it is 6 (friday), then add 2 to the number of days

• If it is 0 (Sunday), then add 1 to the number of days