Shanghai to San Juan, Puerto Rico Time Converter
Quick answers
Selected conversion
8:00 pm20:00 CST (UTC+8), Oct 27, 2026 = 8:00 am08:00 AST (UTC-4), Oct 27, 2026
Shanghai is 12 hours ahead of San Juan.
How the time difference changes
Shanghai is 12 hours ahead of San Juan, Puerto Rico year-round.
Working hours of 9:00 am to 6:00 pm in Shanghai correspond to 9:00 pm (previous day) to 6:00 am in San Juan, Puerto Rico.Working hours of 09:00 to 18:00 in Shanghai correspond to 21:00 (previous day) to 06:00 in San Juan, Puerto Rico.
Compare Shanghai time with San Juan time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
CST (China Standard Time) is 12 hours ahead of AST (Atlantic Standard Time).
8:00 pm20:00 in Shanghai, China is 8:00 am08:00 in San Juan, Puerto Rico
Shanghai to San Juan call time
Best time for a conference call or a meeting is between 7am-8am07:00-08:00 in Shanghai which corresponds to 7pm-8pm19:00-20:00 in San Juan (previous day). Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
8:00 pm20:00 CST (China Standard Time) (Shanghai, China). Offset UTC +8:00 hours
8:00 am08:00 AST (Atlantic Standard Time) (San Juan, Puerto Rico). Offset UTC -4:00 hours
8:00 pm20:00 Shanghai, China / 8:00 am08:00 San Juan, Puerto Rico
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