Add (Subtract) Days to a Date

How Does This Date Calculator for Adding (Subtracting) Days Work?

Simply enter an initial date, select whether you want to add or subtract days, and then specify the number of days. The calculator will perform the calculations and provide you with the resulting date in calendar days and workdays. This is especially useful for planning events, projects, or any situation where you need to know a future or past date.

How to Manually Add (Subtract) Days to a Date?

To manually add days to a date, follow these steps:

1. Take the initial reference date.
2. Determine the number of days you want to add.
3. Add that number of days to the initial date.
4. Keep in mind that when doing it manually, you must consider the change of month and year. For example, if you are adding 10 days to a date and doing so brings you to the end of the month, you'll have to advance to the next month and adjust the day. Similarly, if you reach the end of the year, you'll need to increment the year and reset the month and day.

Formula to Add and Subtract Days in Excel

In Excel, to add days to a specific date, use the formula =DATE(YEAR(date), MONTH(date), DAY(date) + number_of_days). For example, to add 7 days to a date in cell A1, use =DATE(YEAR(A1), MONTH(A1), DAY(A1) + 7). This formula will automatically handle changes in month and year if needed.

To subtract days from a date, use the formula =DATE(YEAR(date), MONTH(date), DAY(date) - number_of_days). For example, to subtract 7 days from a date in cell A1, use =DATE(YEAR(A1), MONTH(A1), DAY(A1) - 7). Again, this formula will manage month and year changes correctly.

These formulas allow you to add or subtract any number of days, automatically considering changes in month and year as needed, making them more accurate compared to the simple formulas mentioned earlier.