This was taken 2018-12-07 (17d before Xmas). Judging by the font and familiar packaging (>> 2427692 and >> 2141739 ) it was in the same Tokmanni in Ulvila, Finland, as those.
TBH I’ve no idea how that calendar would work and couldn’t find anything specific on Google, but the packaging says you need to press a spot and it literally lights up, besides storing the usual 31pcs of chocolate.
I didn’t buy one.