You seem to think that here-doc terminators cannot contain whitespace. You're wrong. 
if ($today eq 'Monday') {
    print <<"    OUTPUT";
    Today is Monday. Bla bla bla.
    ...
    Who knows.
    MONDAY
}

[download]
works just fine (but the output will have leading spaces).

Note that in your example, the following works too: 

print <<OUTPUT if $today eq 'Monday';
Today is Monday. Bla bla bla.
...
Who knows.
OUTPUT

[download]

In reply to Re: best way to print paragraphs of text by JavaFan
in thread best way to print paragraphs of text by keiusui

Title:
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