10am in Guam is 5pm in Pacific Time on the previous day.

Frequently asked

Quick answers about converting between Guam and Pacific Time. Can't find what you need? Email [email protected].

What is the time difference between Guam and Pacific Time?

Guam is 17 hours ahead of Pacific Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 10am in Guam, what time is it in Pacific Time?

10am in Guam is 5pm in Pacific Time on the previous day. That's already evening in Pacific Time, after the typical working day ends. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between Guam and Pacific Time?

9am–10am in Guam lines up with 4pm–5pm in Pacific Time the previous day — both sides are inside a 9-to-5 working day.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — ChST and PDT — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.