Philadelphia is typically 13 hours behind Singapore. When it's 9:00 AM in Singapore, it's 8:00 PM the previous evening in Philadelphia. Singapore does not observe daylight saving time, but Philadelphia does.
During US daylight saving time (March to November), the difference is 12 hours. During US standard time (November to March), the difference increases to 13 hours.
Optimal meeting window: 7:00 PM - 10:00 PM Philadelphia time (7:00 AM - 10:00 AM Singapore next day, or 8:00 AM - 11:00 AM in winter). Evening Philadelphia catches morning Singapore.
Philadelphia's pharmaceutical and healthcare industries have growing connections to Singapore's biotech sector. Several major pharma companies have R&D or manufacturing facilities in both regions.