Cambrian Pottery ended in 1870.
It is 1,097 days from the start date to the end date, start date and end date are included.
It is 1,696 days from the start date to the end date, start date and end date are included.
It ended from mass extinction.
Chordates
It is 146 days from the start date to the end date, start day and end day included.
the date that the Olympics that are going to end in August time
It is 36 days from the start date to the end date, end date included.
There are 79 days from the start date to the end date, but not including the end date.
It is 25,568 days from the start date to the end date, but not including the end date
The weblink below is a good start.
farts