Looking for information on when you need to change your clock to summer time in Phoenix (AZ)?

Here is the answer:

If you live in Phoenix (AZ), you won’t need to change your clock on the second Sunday in March (March 9, 2025).

States not observing DST: Arizona (except for the Navajo Nation) and Hawaii do not participate in DST. They remain on standard time year-round.

You can check the DST status for each US state on the interactive map here.