[Answer] Thanksgiving occurs on the:

Step 1 : Introduction to the question "Thanksgiving occurs on the:"

...Thanksgiving is a national holiday in the United States, celebrated on the fourth Thursday of November.

[Ans] What unique annual event occurs in May or June in the small city of Yoro, Honduras?

Step 1 : Introduction to the question "What unique annual event occurs in May or June in the small city of Yoro, Honduras?"

The small Honduran city of Yoro sees a unique weather event every May or June and has for around 100 years or more. Each year the "Rain of Fish" occurs. The Rain of Fish brings hundreds of fish raining down onto the city's streets. This always occurs in the wake of passing severe thunderstorms. This phenomenon has occurred around the world for centuries but there is no definitive causative explanation as to why it happens. Even more baffling is why it occurs on a recurring basis in the tiny city of Yoro, Honduras. Source: LiveScience.com