No Sweeping at the Night.

Description:
You shouldn't sweep at night. It’s a belief that has been passed down in some cultures in Indonesia's islands, particularly in Java Island. The idea behind this superstition is that sweeping at night brings bad luck, misfortune, or other negative consequences.

Irrational Reason:
One of the most common beliefs is that sweeping at night can "sweep away" good luck, money, or happiness. Some people believe that cleaning the house when it's dark or quiet is a way of accidentally getting rid of positive things, like prosperity or good fortune.

Rational Reason:
One practical reason why people might have avoided sweeping at night is because it was hard to see. In the past, houses often didn’t have electricity, and people relied on candles or oil lamps for light. Sweeping in poor light conditions meant people couldn't see all the areas that needed cleaning, and they might have missed spots. This could lead to a messy or incomplete cleaning job.