dayDiff 

Calculates the difference between two given dates and returns the number of days.
Parameters
date1::Datedate2::Date?
Returns
number'
Examples
javascript
dayDiff(new Date('2021-01-01'), new Date('2021-01-03')); // Returns 2dart
dayDiff(DateTime(2021, 1, 1), DateTime(2021, 1, 3)); // Returns 2python
from datetime import datetime
dayDiff(datetime(2021, 1, 1), datetime(2021, 1, 3)) # Returns 2