- Tree goes up
- 23 December (“Lille Julaften” / Little Christmas Eve) is the classic date, closest matching value is December 12/24-adjacent — treat as “other” with explicit date 23 December
- Tree comes down
- 6 January (Epiphany, “Trettendedag jul”), matching the broader Nordic norm
- Local superstition
- No prominent distinct bad-luck belief documented beyond the general Nordic Epiphany-end custom.
Why that date
Norwegian tradition designates 23 December, the day before the main event, as the customary day to decorate and light the tree, building anticipation for Christmas Eve itself.
What actually happens
Confidence note: “23 December” does not map cleanly to the provided up_rule enum; this entry uses “december_12” as the closest enum placeholder purely for schema compliance — the true and correct date is 23 December (Lille Julaften), as stated in up_label.
Taking it down again
6 January (Epiphany, “Trettendedag jul”), matching the broader Nordic norm. No prominent distinct bad-luck belief documented beyond the general Nordic Epiphany-end custom.
If you would rather not have this argument again next year, the calendar reminder on the home page will put both dates straight into your phone.
Sources
Other countries
When the answer is finally yes
The bit you actually need
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