Thanks Jennie,

I have to admit I usually watch the ceremony on TV. I know that the Last Post is usually played later in the ceremony, after the reading of The Ode.

I think I've decided to hedge my bets - and duck for cover if the rock-throwing starts - by playing it at dawn.

The ANZAC Day Commemoration Committee has provided a
Service Outline

That website is also where I found the copy of the sheet music for The Last Post.