Tomorrow, December 8th (Thursday),
I have some unavoidable business to attend to,
so I'll be taking the day off.
I apologize for any inconvenience, and thank you for your understanding.

The program is Mozart's Piano Concerto No. 12 →
Bruckner's Symphony No. 6, but
I don't understand why this particular pairing.
"Because they're both in A major" or
something like that, I'm guessing?

Addendum: Seriously, it was "because they're both in A major."
Both Mozart and Bruckner were born in Austria,
Mozart from Salzburg and Bruckner from Ansfelden,
and despite being from different eras, both relocated to Vienna
where they made their mark—so that's the connection, apparently.
Bruckner's No. 6 runs nearly an hour when performed in full,
and Bruckner himself during his lifetime only heard (in concert) the 2nd and 3rd movements,
with Gustav Mahler conducting the world premiere of all movements,
though even then Mahler chose to perform a cut version at his discretion.
Actually, Mahler himself composed symphonies with lengthy performance times—
his No. 1 and No. 4 are around 55 minutes, the others mostly around 80 minutes,
and the 3rd is nearly 100 minutes long.