- Tree goes up
- 8 December (Día de la Inmaculada Concepción), a fixed national public holiday
- Tree comes down
- The day after 6 January (Día de los Reyes Magos / Epiphany)
- Local superstition
- No strong bad-luck belief documented, though removal on the specific day after Epiphany is treated as the firm customary close.
Why that date
8 December, the Feast of the Immaculate Conception, is a non-movable national holiday in Argentina and has become the near-universal day to assemble the tree (“el arbolito”); legend traces the local custom to 1807, when an Irish immigrant reportedly decorated a tree in a Buenos Aires public park.
What actually happens
Argentina has one of the most consistent, strongly-sourced single-date traditions in this research — 8 December is repeatedly and uniformly cited across Argentine national media as the day the tree goes up, even among non-practising Catholics.
Taking it down again
The day after 6 January (Día de los Reyes Magos / Epiphany). No strong bad-luck belief documented, though removal on the specific day after Epiphany is treated as the firm customary close.
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.
Other countries
When the answer is finally yes
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