Well here in New Zealand [and Australia too I think], we have as you put it "Boxing day 2" on January 2.
[its called 'The Day after New Years Day' - kind of unoriginal]

Its a public holiday like Christmas Day, Boxing Day and New Years day.

Of course its summer here so it makes sense to have some public holidays at this time.

Pity the weather here hasn't woken up to the fact its summer yet :-(((