DST is generally not observed near the equator, where sunrise times do not vary enough to justify it. Some countries observe it only in some regions; for example, southern Brazil observes it while equatorial Brazil does not. Only a minority of the world's population uses DST because Asia and Africa generally do not observe it.
বিশ্বের কোন দুটি মহাদেশ ডিএসটি পালন করে না?
Asia and Africa