Hyderabad is 13 hours and 30 minutes ahead of San Francisco during standard time (or 12.5 hours during PDT). San Francisco uses Pacific Time (PT, UTC-8/-7) while Hyderabad uses Indian Standard Time (IST, UTC+5:30). When it's 12:00 PM in San Francisco, it's 1:30 AM the next day in Hyderabad.
India does not observe daylight saving time, so the difference varies between 12.5 and 13.5 hours depending on whether San Francisco is on PST or PDT.
Best calling time: 6:00 AM - 8:00 AM San Francisco time. This corresponds to 7:30 PM - 9:30 PM in Hyderabad (or 6:30 PM - 8:30 PM during PST), catching Indian evening hours.
Hyderabad is India's tech hub, often called "Cyberabad." Major Silicon Valley companies including Microsoft, Google, and Amazon have significant development centers there. This makes SF-Hyderabad one of the most important tech corridors globally.