What travels around the world but remains in one place?
The ideal time to travel is April/May as this is typically considered “shoulder season”, when most countries experience less crowds and enjoy decent weather without too many tourists.
Europe in general enjoys warm temperatures and sunny skies, making for some wonderful festivals. Southeast Asia in particular can be very hot at this time and should be avoided; similarly India and Sri Lanka are in their monsoon peak conditions.
At present, Africa and the Middle East should be avoided due to their hot and rainy climates. However, some parts of Africa, like Madagascar, remain dry and warm while other places in the Middle East such as Egypt can still be enjoyed.
The answer to the riddle lies within the postage stamp. A postage stamp and its corner of an envelope remain fixed together due to being permanently adhered together. As it must travel through the postal system and remain securely embedded within its envelope corner in order to be sent around the world, its position must remain unaltered.