When it is 12:00 PM in San Juan, it is 12:00 AM in AST.
📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.
San Juan is 12 hours ahead of AST.
🕐 Subtract 12 hours from San Juan time to get AST time.
San Juan uses 8 hours ahead of Universal Time (UTC+8) and AST uses 4 hours behind Universal Time (UTC-4).
| San Juan Time | AST Time | |
|---|---|---|
| 12 AM San Juan Time | ↔ | 12 PM AST Time |
| 1 AM San Juan Time | ↔ | 1 PM AST Time |
| 2 AM San Juan Time | ↔ | 2 PM AST Time |
| 3 AM San Juan Time | ↔ | 3 PM AST Time |
| 4 AM San Juan Time | ↔ | 4 PM AST Time |
| 5 AM San Juan Time | ↔ | 5 PM AST Time |
| 6 AM San Juan Time | ↔ | 6 PM AST Time |
| 7 AM San Juan Time | ↔ | 7 PM AST Time |
| 8 AM San Juan Time | ↔ | 8 PM AST Time |
| 9 AM San Juan Time | ↔ | 9 PM AST Time |
| 10 AM San Juan Time | ↔ | 10 PM AST Time |
| 11 AM San Juan Time | ↔ | 11 PM AST Time |
| San Juan Time | AST Time | |
|---|---|---|
| 12 PM San Juan Time | ↔ | 12 AM AST Time |
| 1 PM San Juan Time | ↔ | 1 AM AST Time |
| 2 PM San Juan Time | ↔ | 2 AM AST Time |
| 3 PM San Juan Time | ↔ | 3 AM AST Time |
| 4 PM San Juan Time | ↔ | 4 AM AST Time |
| 5 PM San Juan Time | ↔ | 5 AM AST Time |
| 6 PM San Juan Time | ↔ | 6 AM AST Time |
| 7 PM San Juan Time | ↔ | 7 AM AST Time |
| 8 PM San Juan Time | ↔ | 8 AM AST Time |
| 9 PM San Juan Time | ↔ | 9 AM AST Time |
| 10 PM San Juan Time | ↔ | 10 AM AST Time |
| 11 PM San Juan Time | ↔ | 11 AM AST Time |
San Juan is 12 hours ahead of AST.
San Juan is ahead of AST by 12 hours.
It is 9:00 PM the previous day in AST.