Time difference between San Juan and Shanghai
World time board
San Juan · Puerto RicoUTC-04:00
04:45 AMFRI 02.10.2026
Now 04:45 AM|Live
Drag or scroll · click an hour · ◀ ▶ by hour · 3 days of range
Work–
daydawn / dusknight
- Time difference
- San Juan is 12 hours behind
- Changes with DST
- No
- Day difference
- Same day
- Typical workday overlap (9am–6pm)
- None
| San Juan | Shanghai |
|---|---|
| 00:00 | 12:00 |
| 01:00 | 13:00 |
| 02:00 | 14:00 |
| 03:00 | 15:00 |
| 04:00 | 16:00 |
| 05:00 | 17:00 |
| 06:00 | 18:00 |
| 07:00 | 19:00 |
| 08:00 | 20:00 |
| 09:00 | 21:00 |
| 10:00 | 22:00 |
| 11:00 | 23:00 |
| 12:00 | 00:00+1 |
| 13:00 | 01:00+1 |
| 14:00 | 02:00+1 |
| 15:00 | 03:00+1 |
| 16:00 | 04:00+1 |
| 17:00 | 05:00+1 |
| 18:00 | 06:00+1 |
| 19:00 | 07:00+1 |
| 20:00 | 08:00+1 |
| 21:00 | 09:00+1 |
| 22:00 | 10:00+1 |
| 23:00 | 11:00+1 |
How the time difference changes over the next 12 months
San Juan is 12 hours behind Shanghai. The difference stays the same all year, because neither San Juan nor Shanghai changes its clocks.
Working hours
With a 9:00 AM–6:00 PM working day in both places, there are no shared hours: 9:00 AM in San Juan is 9:00 PM in Shanghai.
From 12:00 PM to midnight in San Juan, it is already the next day in Shanghai.
Frequently asked questions
- What is the time difference between San Juan and Shanghai?
- San Juan is 12 hours behind Shanghai.
- Does the time difference between San Juan and Shanghai change during the year?
- No. The difference stays the same all year, because neither San Juan nor Shanghai changes its clocks.