And good riddance to the 9-5 workday; it's a relic of an work-era long gone. In terms of poetry and art, well yes, people will not quite understand the reference eventually, but this is already the case with older art (who understands the references in 20's folk music?)
"It's 5 O'Clock Somewhere" loses all meaning, along with anything else referencing the 9-5 workday.