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Here are the links for this topic:
Fertility Trends in Singapore: https://numbers.sg/posts/surprising-trends-singapore-fertility/
Y2K on Wiki: https://en.wikipedia.org/wiki/Year_2000_problem
2012 movie: https://en.wikipedia.org/wiki/2012_(film)
The real meaning of the Mayan calendar: https://www.nationalgeographic.com/news/2011/12/111220-end-of-world-2012-maya-calendar-explained-ancient-science/
Mayan calendar wiki: https://en.wikipedia.org/wiki/Maya_calendar
Anti-vaxxers and measles: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6657116/
Business superstitions around the world:https://www.impactbnd.com/blog/international-business-superstitions
The effects of superstitions on a destination’s desirability: https://pdfs.semanticscholar.org/90a2/2f0ace0bbcee0c21055d8762a0f1e991f333.pdf
Nepal deaths in period huts: https://www.bbc.com/news/world-asia-46823289