This is 3 days before Christmas Day, the 22nd of December, and your last chance of doing any worthwhile christmas shopping before the last minute crowds become suffocating
"right, I've got to do some christmas eve eve eve shopping before town gets too busy"
the day before christmas eve eve, 3 days before christmas
On christmas eve eve eve, stores are empty and the chance of getting anything is slim
The day you realize Christmas Eve is only 2 days away and you start panicking because you haven't bought all your gifts.
Dad, what's wrong with mom ?" "She realized it's Christmas Eve Eve Eve, and is going shopping.