Web scraping

use HTTP::Client; # https://github.com/supernovus/perl6-http-client/
my $site = "http://tycho.usno.navy.mil/cgi-bin/timer.pl";
HTTP::Client.new.get($site).content.match(/'<BR>'( .+? <ws> UTC )/)[0].say

Note that the string between '<' and '>' refers to regex tokens, so to match a literal '<BR>' you need to quote it, while <ws> refers to the built-in token whitespace. Also, whitespace is ignored by default in Perl 6 regexes.