Short and sweet, the end is nigh !!
The event itself is set to end on Feb 1st at 14:00 UTC
The Shattered Dreams box ends on Feb 7th at 14:01 UTC
14:00 UTC is UK 2pm GMT and US 9am ET.
If you haven’t finished the prize track try and at least start part 5. I believe when the timer runs out you’ll see the message “Springfield’s Got Talent? is over! But don’t worry! You can still finish your current quest and earn its reward.”