Traditions are practiced because they are usually ways in which we do things that are so common that it would be unwise to reinvent these ways. Who would want to give up pancake day?!
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Superstitions, on the other hand, are practiced because they “give people a sense of control”, as if the future can be changed because I threw salt over my shoulder after I spilled it, or because they “soothe the nerves of those who do not believe in them” – we also like to be able to blame bad happenings on forces outside of our control. I think familiarity brings a lot of joy to people, too. ​

The official definitions are as follows...

Tradition:

Noun

 the transmission of customs or beliefs from generation to generation.

"members of different castes have by tradition been associated with specific occupations"

Superstition:

Noun

 a widely held but irrational belief in supernatural influences, especially as leading to good or bad luck, or a practice based on such a belief.

"she touched her locket for luck, a superstition she'd had since childhood"

In different cultures...
- “One superstition in Hindu culture that my family practices is that if I accidentally touch a book with my feet, I have to touch it with my right hand and touch my forehead,” Kavulli said. “It’s a sign of respect because those objects are forms of God in a sense. I’m not religious myself, but I practice the superstition because it’s a tradition that I was taught as a child.”

- “I’ve been taught is to not cut hair or nails after sunset because that is when God enters the household,” junior Satvik Shreesha said. “I’m not sure about any bad effects resulting from not following the superstition, but it’s just disrespectful to God overall. It’s been ingrained in me, so I just like to follow it.” 

- You would not feel lonely when you celebrate your birthday in the Netherlands. In this country, it is a tradition to greet the person celebrating the birthday as well as the person’s family and other relatives.

- For many cultures, children are told to keep their baby teeth under their pillow and the Tooth Fairy will give them money in exchange for their teeth. But Greek children are told to toss their tooth onto their roofs. The cultural tradition is meant for the child to have a healthy tooth as well as good luck to the family.

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https://lhsepic.com/15929/features/the-cultural-diversity-of-superstitions/

https://www.daytranslations.com/blog/20-traditions-around-the-world/