Hong Kong to San Mateo Time Difference

24-Hour Comparison

Each column is the same moment in both cities, starting from right now and rolling forward 24 hours — daylight saving is already accounted for.

Best Time to Call

On a typical weekday (Monday–Friday).

Hong Kong and San Mateo have little to no overlap in typical business hours (9 AM–5 PM) — an early morning or evening call works best for one side.

Frequently Asked Questions

What is the time difference between Hong Kong and San Mateo?

San Mateo is 15 hours behind Hong Kong. Hong Kong is currently UTC+8 and San Mateo is UTC-7.

Is San Mateo ahead of or behind Hong Kong?

San Mateo is behind Hong Kong.

What is the best time to call San Mateo from Hong Kong?

Hong Kong and San Mateo have little to no overlap in typical business hours (9 AM–5 PM), even on a weekday — an early morning or evening call works best for one side.

What is the best time for a remote team standup between Hong Kong and San Mateo?

Hong Kong and San Mateo have little to no live overlap in typical business hours, so a synchronous standup rarely works for both sides. Instead, treat 05:00 PM in Hong Kong (02:00 AM in San Mateo) — the end of Hong Kong's typical workday — as the async handoff point: write an end-of-day summary then, so the San Mateo team has full context when their day starts.

Does the time difference between Hong Kong and San Mateo change during the year?

Yes. Hong Kong and San Mateo don't switch to daylight saving time on the same schedule, so the offset shifts by up to an hour for part of the year.