Looking at the Analemma, the sun is so close to 23.5 S Latitude any date between now and January 1st would be a good time for a photo as weather/clouds allow.
Just over a week until the Solstice.
As we can see by the analemma the direct ray of the sun is very nearly at 23.5 degrees south.
From now until early January there will be little additional movement of the sun.
Since Solstice means “Sun Stands Still” there is a wide time frame to photograph the sun at its farthest extent south.
(Unlike the Equinox when the sun was advancing quickly day by day.)
Take a photo of the sun either rising or setting on an east-west road to show how far south the sun has traveled since the Autumal Equinox when the sun rose/set directly on the road.
If you happen to live in an area with few if any E-W roads as long as you are facing due east or west, the sun will be well off that line.
Ideally, photograph the sun on the actual Solstice; Pragmatically, a few days ahead of or behind that date will make little difference.
Oh! Include your bicycle in the photo!!!