Days from the start date to the end date can be calculated by selecting the start date and the end date, and clicking "Calculate number of days" button.
When you select the "Include start date", the start date is the first day.
The date of the end date can be calculated by inputting days from the start date and the start date, and clicking "Calculate the date" button.
When you select the "Include start date", the start date is the first day.
The date of the end date can be calculated by inputting days from the start date and the start date, and clicking "Calculate the date" button.
When you select the "Include start date", the start date is the first day.