How to find the number of days between two dates?

So one date can be berween 12_6, so twelve or six hours you multaply it by another witch if the first date was 12+12so what does that = and then tht would be

the second date so it could be nother 12+12 day and night so you count between the hours hoped I helped plz mark as brainy thx

Here for a good time of free question aha