How does excel calculate the date?

Select the "DAYS360" function. Detailed steps:

1, open the excel table.

2. Enter the date to be calculated.

3. Click "Formula" in the task bar above, and select the insert function.

4. Select Date and Time in the category.

5. Select the "DAYS360" function.

6. According to the instructions, enter the start time and end time into the table respectively.

7. Then automatically calculate the date, so do other dates.