trouble exercising rrso?

Went to the Post Office for an express envelope to post my cheque to Range Resources today in Brisbane.
Yes i know i only have until tomorrow. But Express post will get it there tomorrow or will it?
The Post Master just told me that tomorrow is a Australia Post holiday so if i posted it is would not get there on time.
Fortunately i arranged for a friend in Perth to look after it for me.
I wonder if RRS knew that the Exercisable date was on a Saturday and that the day before was a Australian Post holiday.

Australia post needs a swift kick in the you know whats.

It was not public knowledge that Friday the 30th December was a designated holiday for Australia post.