Singapore is UTC+8 (GMT+8, no DST). Los Angeles is UTC−7 (PDT) / UTC−8 (PST). Los Angeles is currently 15 hours behind Singapore.
There is no overlap of standard business hours (09:00–17:00) between these two cities. Consider early morning or late afternoon calls where one side works slightly outside core hours.
Times shown in Singapore local time → Los Angeles local time. Based on business hours 09:00–17:00.
Singapore observes Singapore Standard Time (SGT, UTC+8) year-round, with no Daylight Saving Time. The fixed UTC+8 is shared with Hong Kong, China (CST), Malaysia (MYT), the Philippines (PST), and Western Australia (AWST) — making it arguably the world's most-shared standard timezone offset. Singapore adopted its current timezone in 1982, switching from UTC+7:30 to UTC+8 to align with Malaysia and the rest of the region, which facilitated commerce and communication across the Strait of Malacca.
Singapore is one of the world's leading financial centres and the busiest container port by tonnage. The Singapore Exchange (SGX) opens at 09:00 SGT and closes at 17:00 SGT. Singapore's position at UTC+8 creates a trading day that overlaps with Tokyo (UTC+9) in the morning and with Europe (CET, UTC+1) in the late afternoon. The London–Singapore overlap during standard time is only about 2 hours of shared business hours (08:00–10:00 SGT = 00:00–02:00 GMT), which in practice means that Singapore–London calls almost always require one party to work outside core hours.
Singapore lies just 1° north of the equator, which means it has minimal seasonal variation in daylight — sunrise and sunset occur within about 20 minutes of the same time year-round. With no need for seasonal adjustment, SGT has been stable for over 40 years, making it one of the most predictable timezones for international scheduling. Singapore is 8 hours ahead of London (winter), 13 hours ahead of New York (EST), and 1 hour behind Tokyo. The "Singapore hour" — the sweet spot for pan-Asian calls, roughly 10:00–12:00 SGT — is often cited in APAC business culture.
Los Angeles observes Pacific Time: UTC−8 (PST, Pacific Standard Time) in winter and UTC−7 (PDT, Pacific Daylight Time) during DST, which runs from the second Sunday in March to the first Sunday in November. The Pacific Time Zone covers the US West Coast, British Columbia in Canada, and parts of Mexico. Los Angeles is 3 hours behind New York, 8 hours behind London (winter), and 17 hours behind Tokyo — the largest offset between any two major business hubs, making real-time collaboration between LA and Tokyo exceptionally difficult.
California's economy is the fifth largest in the world by GDP, and Los Angeles is its entertainment and technology hub. The entertainment industry's standard workday is broadly 10:00–18:00 PT — slightly later than the East Coast norm — a schedule partly shaped by the city's car culture and long commutes. Silicon Valley, though technically in the San Francisco Bay Area (same timezone), has contributed to a global culture of asynchronous work that somewhat eases the burden of Pacific–European collaboration.
California voters approved Proposition 7 in 2018, which would allow the state legislature to enact year-round DST, but federal law changes are required before the state could actually stop changing its clocks. Until then, LA changes on the same schedule as the rest of the continental US. The Pacific–Eastern 3-hour gap means that Wall Street has been open for three hours by the time most Angelenos start their workday — a feature, not a bug, for West Coast traders who read overnight news before the market opens.
Los Angeles is currently 15 hours behind Singapore.
When it is 12:00 noon in Singapore, it is 21:00 in Los Angeles (based on current offsets — verify during DST transitions).
Singapore does not observe DST — GMT+8 is used year-round. Los Angeles observes DST, changing from PDT to PST.