Hello again eniad,

Well a simple example would answer your question:

#!/usr/bin/perl
use strict;
use warnings;
use Date::Manip;
use feature 'say';

my @dates = ( "2018-02-20 00:00:00",
          "20180220",
          "02/20/2018",
          "02/20/18",    # interpreted as 1918-02-20
          "2018-02-20",
          "today");

say UnixDate( ParseDate($_), "%Y-%m-%d") for (@dates);

__END__

$ perl test.pl
2018-02-20
2018-02-20
2018-02-20
2018-02-20
2018-02-20
2018-02-20
[download]

So in conclusion, yes the module can parse all the dates that you provided.

Update: If you want to know which date formats are acceptable from the module read here Date::Manip::Date/VALID DATE FORMATS. On the same link you will find time formats but also date and time formats combined.

Update 2: A minor similar example on how to parse time and print also time zone if you are interested:

#!/usr/bin/perl
use strict;
use warnings;
use Date::Manip;
use feature 'say';

my @dates = ( "2018-02-20 00:00:00",
          "20180220",
          "02/20/2018",
          "02/20/18",    # interpreted as 1918-02-20
          "2018-02-20",
          "today", # current date
          "now" # current date with also time
    );

say UnixDate( ParseDate($_), "%Y-%m-%d %T %Z") for (@dates);

__END__

$ perl test.pl in.txt
2018-02-20 00:00:00 CET
2018-02-20 00:00:00 CET
2018-02-20 00:00:00 CET
2018-02-20 00:00:00 CET
2018-02-20 00:00:00 CET
2018-02-20 00:00:00 CET
2018-02-20 18:03:16 CET
[download]

Hope this helps, BR.