Shouldn’t this thing be like $5 now? The jars will be a year old by the time Advent 2020 arrives and who knows when they were produced. If lemon curd* is one of the offerings that only has a shelf life of a year from production according to the website. In which case you couldn’t even use it as a calendar in 2020 which greatly diminishes the value of it, but that is of course only my humble opinion.
*I am having a tuff time seeing if there is any curd in it because the photo is whey too blurry.
The calendar is last year. The jars are 1oz. NOT a deal, Woot!
The advent calendar doesn’t have days of the week or a year on it. Shelf life is to June 2020.
So the calendar will still be good, but not the jam?! Is there a niche market for this that I’m not aware of?! 
Think of it as 24 days of surprise fruit spread.
Surprise! You got botulism! Blueberry Botulism!