in reply to Calculate difference between multiple days

What do you mean by "the difference in days between 3 dates"? What answer do you expect for, e.g., 2005-09-27, 2019-12-22, and 2018-10-24?

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In Section Seekers of Perl Wisdom