While it’s not an official event, popular Instagram page Get Naked Australia has been promoting it.
In the lead up to September 13, the account has been urging its 226,000 followers to explore the great outdoors in the buff.
A recent post reads: “A reminder that next Sunday the 13th of September is GNA Naked in Nature Day 2020!
“This is not yet an ‘official’ day but we’re trying to make it one! For the second year running, Naked in Nature Day aims to promote people getting outside and spending time in great outdoors minus clothing.
“Find somewhere secluded, grab your mates and get involved!
“Whilst we celebrate getting naked in nature everyday, we found that setting a date really encourages people to make that extra effort and get involved to spread the body positivity.”
Get Naked Australia encouraged followers to take snaps of themselves being at one with nature.
They tagged the pictures with #nakedinnatureday – and there’s been some brilliant submissions so far.
Take a look at the cheeky gallery below – and why not participate yourself too?
At one with nature
Daring to bare
Making a splash