Which countries or states do not observe DST?
Quick Answer: Several countries and regions do not observe Daylight Saving Time (DST), including most of Africa, Asia, and parts of Oceania. Notably, the US states of Arizona (except the Navajo Nation) and Hawaii also skip DST. Countries like Japan, India, and China stay on standard time year-round.
Many countries avoid DST because it disrupts daily routines, doesn't save much energy, or complicates international coordination. Near the equator, daylight hours don’t change much across seasons, so switching clocks offers little benefit.
In the US, Arizona and Hawaii opt out because the heat in Arizona would make evening daylight uncomfortable, and Hawaii’s location near the equator keeps daylight consistent. Globally, most of Africa and Asia stay on standard time for simplicity and consistency.