A terminal-based program that calculates days left until a given date that parses DateStrings in multiple UNIX-compliant formats created by Bupper
hypeban, hp
Perform calendar date operations using UNIX-formatted date strings.
Enter a date as follows.
> since 1969-07-20
Date input: 1969-07-20
Output: 19078
> since 01-31-2000
Date input: 01-31-2000
Output: 7926
> until 2021-10-31
Date input: 2021-10-31
Output: 3
> until 10-31-2021
Date input: 10-31-2021
Output: 3
GNU GENERAL PUBLIC LICENSE v3.0