As of today, most of the United States and many regions observe daylight saving time, but there are exceptions. Here’s the concise status and what to expect:

• In the United States, daylight saving time ends on the first Sunday in November, which in 2025 falls on November 2. Clocks are set back by one hour at 2:00 a.m. local time, effectively giving the nation an extra hour of sleep that night. After the change, standard time remains in effect until daylight saving time resumes in March. [Sources: national news outlets and time-keeping websites tracking 2025 DST changes]
• A handful of places do not observe daylight saving time at all. These typically include most of Arizona (except the Navajo Nation) and several U.S. territories like Puerto Rico, the U.S. Virgin Islands, Guam, and American Samoa. If you’re traveling or coordinating with someone in one of those areas, their clocks will not shift on the November transition. [Typical DST participation patterns widely reported by time-keeping resources]
• In practice, you may notice earlier sunsets after the shift to standard time, and morning daylight will be a bit less, especially on the western parts of the country where time zone differences can accentuate the change.

If you’re asking about a different country or region, or you want the exact status for a specific city or state, tell me which location you have in mind and I’ll confirm whether DST is observed there and exactly when the change occurs.