Last years Black Friday sale was "on selected flights to Aussie, Asia and North America". Unfortunately the email itself doesn't have prices or travel dates so I can't tell you what those were. If it's helpful, in the month or so prior to Black Friday I also have emails for sales to The Islands (email received 20 Nov), Aussie (13 Nov), around NZ (6 Nov), North America & Asia (30 Oct) , Seoul (26 Oct) and Perth (16 Oct)

Straight after Black Friday I also have
USA (1 Dec)
North America & Asia (13 Dec)

The the New Year sale (8 Jan) was Aussie, The Islands, North America & Asia.

If you're looking for Europe these appear to be far less common, past dates I have for Europe sales emails are

12 Sep 2024
25 Jan 2024
11 Sep 2024
6 Jan 2020 (not sure if I'm missing some emails there just weren't any sales to Europe in 3.5 years. Covid n all it's probably the latter, I do have the odd sprinkling of Aussie sales emails in 2021 and 2022, and everywhere else in 2023.

Past performance is no guarantee of future performance yadda yadda