“ Real World: some Indians in the Amazon treat their eyes with a traditional potion applied with palm leaves. Brutally painful, the drug alters vision, giving the jungle's dense green walls greater texture and dimension. You could adapt this to desert or swamps, or other hard to navigate regions.”
“ Once a year there is Birthday. On this day everyone celebrates their birthday regardless of the day they were born. In practice anyone born in November or December waits till the following Birthday. It is a combination of your birthday and Christmas,
Birthday tree
The magic version of this is empowered by a god to reward their followers once a year. a present will appear Birthday morning. it will be empowered by how well a member of the household provides service or offerings to the god. They vary in power level at GMs discretion.”