Daylight saving time is observed by a subset of countries, primarily in Europe, North America, and parts of Oceania and the Southern Hemisphere, with many countries in other regions opting not to use it. The exact list changes over time as countries adopt, abolish, or modify DST rules, and some locations within countries (like certain states or territories) observe it differently from others. If you want a current, country-by-country list for 2025, I can pull a recent snapshot and present a concise table. What would you like to see first?

• A current global roster of countries that observe DST in 2025, with their standard start and end dates
• A regional breakdown (e.g., Europe, North America, Oceania) showing which areas use DST and which do not
• A quick FAQ addressing common DST questions (which countries changed recently, how clocks shift, etc.)

Note: I can provide up-to-date, sourced details if you specify the format you prefer (list, table, or regional summary).