Provide the second date to find the difference, or use the current date to find an exact age.

And with that, Calico knew that even though they were apart, their bond would remain strong. She closed her eyes, feeling a sense of closure and comfort, knowing that Emma would always be there for her, no matter what.

The basic Calkoo date tool counts all days. However, their "Working Days Calculator" (also under "Fecha") lets you exclude weekends and even list holidays.