San Diego to Rome Time Difference
Rome is 9 hours ahead of San Diego. When it's 05:57:49 AM in San Diego, it's 02:57:49 PM in Rome.
How Many Hours Ahead Is Rome From San Diego?
Rome is 9 hours ahead of San Diego. So San Diego is 9 hours behind Rome looking the other way — the same gap, described from the other end.
In practice that means a working day in San Diego starts when it is already 6:00 PM in Rome. The gap is not fixed all year: it becomes 8 hours on Sunday, October 25, 2026, when Rome changes its clocks.
Best Time to Call San Diego and Rome
Standard 9-to-5 hours in San Diego and Rome never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 1:00 PM in San Diego, which is 4:00 PM to 10:00 PM in Rome.
both at work San Diego only Rome only neither — hours shown along the strip are San Diego local time.
Convert a Specific Time
Pick any date and time in San Diego to see the exact equivalent in Rome.
Common Times Converted
San Diego time on the left, Rome time on the right.
San Diego to Rome: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in San Diego. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| San Diego | Rome | Working hours |
|---|---|---|
| 12:00 AM | 9:00 AM | Rome only |
| 1:00 AM | 10:00 AM | Rome only |
| 2:00 AM | 11:00 AM | Rome only |
| 3:00 AM | 12:00 PM | Rome only |
| 4:00 AM | 1:00 PM | Rome only |
| 5:00 AM | 2:00 PM | Rome only |
| 6:00 AM | 3:00 PM | Rome only |
| 7:00 AM | 4:00 PM | Rome only |
| 8:00 AM | 5:00 PM | — |
| 9:00 AM | 6:00 PM | San Diego only |
| 10:00 AM | 7:00 PM | San Diego only |
| 11:00 AM | 8:00 PM | San Diego only |
| 12:00 PM | 9:00 PM | San Diego only |
| 1:00 PM | 10:00 PM | San Diego only |
| 2:00 PM | 11:00 PM | San Diego only |
| 3:00 PM | 12:00 AM next day | San Diego only |
| 4:00 PM | 1:00 AM next day | San Diego only |
| 5:00 PM | 2:00 AM next day | — |
| 6:00 PM | 3:00 AM next day | — |
| 7:00 PM | 4:00 AM next day | — |
| 8:00 PM | 5:00 AM next day | — |
| 9:00 PM | 6:00 AM next day | — |
| 10:00 PM | 7:00 AM next day | — |
| 11:00 PM | 8:00 AM next day | — |
Understanding the San Diego – Rome Time Difference
San Diego runs on America/Los_Angeles, currently PDT (UTC-7:00). Rome runs on Europe/Rome, currently CEST (UTC+2:00). The gap of 9 hours is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, October 25, 2026, when Rome adjusts its clocks and the difference becomes 8 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
San Diego today
Rome today
Frequently Asked Questions
What is the time difference between San Diego and Rome?
Rome is currently 9 hours ahead of San Diego. That gap becomes 8 hours on Sunday, October 25, 2026, when Rome changes its clocks.
How many hours ahead is Rome from San Diego?
Rome is 9 hours ahead of San Diego. Looking at it the other way, San Diego is 9 hours behind Rome.
What time is it in Rome when it is 9:00 AM in San Diego?
When it is 9:00 AM in San Diego, it is 6:00 PM in Rome.
Is Rome ahead of or behind San Diego?
Rome is 9 hours ahead of San Diego. Rome reaches each point in the day first, so its working day is already finishing while San Diego is still getting started.
What is the best time to call between San Diego and Rome?
Standard business hours in San Diego and Rome do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 1:00 PM in San Diego, which is 4:00 PM to 10:00 PM in Rome.
Does the time difference between San Diego and Rome change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to 8 hours on Sunday, October 25, 2026.
What time zones are San Diego and Rome in?
San Diego uses the America/Los_Angeles time zone, currently PDT (UTC-7:00). Rome uses Europe/Rome, currently CEST (UTC+2:00).