This is when the lake becomes a magnet for the brave, the bold, the beautiful and the barmy!
The day starts with the MoreFM Birdman Competition, where normally rational humans try to fly to the beach in fancy dress. Naturally their heroic failures end in all manner of peculiar and hilarious plunges.
At the lake edge where the temperatures have shrunk the competitors' most important organs (their brains), they line up for the SkidealsNZ.com Splash and Dash.
Throughout the day there'll be people competing for cash in hilarious events in all manner of racing gear, from the skimpy to the scandalous, cheered on by a crowd in stitches.