Best overlap: 8:00 AM to 9:00 AM in Singapore is 5:00 PM to 6:00 PM in San Diego.
Target 8:00 AM to 9:00 AM in Singapore, which lands at 5:00 PM to 6:00 PM for the San Diego side. San Diego is 15 hours behind Singapore, so common hours are scarce (about 1 hour). Lock the slot, keep it short, and follow up in writing. The date rolls over between them: San Diego is on the previous day relative to Singapore during these hours. Note that San Diego follows daylight saving while Singapore stays put, so the times above drift by an hour seasonally.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Singapore Asia/Singapore | ||||||||||||||||||||||||
San Diego America/Los Angeles |
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