Possible Clues:

• ''The weekend's almost here!''
• "About time the week ended!"
• 'I'm ready for the weekend!'
• "At last, the weekend!"
• Nine-to-fiver's cry
• Weekly 'Whew!'
• Workweek's end initials
• Week-ending cry
• Cry after a long week
• Katy Perry "Last Friday Night (___)"