Best time to meet between San Francisco and Singapore

Related time zone pairs

Each pair has its own page with the overlap already loaded.

• San Francisco ↔ LondonA narrow window: early Pacific mornings before the UK signs off.
• San Francisco ↔ SydneyLate Pacific afternoon is Sydney's next morning.
• London ↔ SingaporeLondon mornings land in Singapore's late afternoon.
• New York ↔ SingaporeHalf a day apart. Someone is always outside working hours.
• San Francisco ↔ TokyoPacific afternoons reach Tokyo's next morning.
• New York ↔ LondonUS mornings are London afternoons, a 5-hour spread.

Also: New York ↔ Mumbai, New York ↔ Tokyo, Los Angeles ↔ London, Chicago ↔ London, Toronto ↔ London, New York ↔ Paris, New York ↔ Sydney, London ↔ Mumbai, London ↔ Dubai, London ↔ Hong Kong, London ↔ Sydney, Los Angeles ↔ Sydney

How the scoring works

Every 15-minute slot of the day gets a score for each person on the call, based on their local clock and working hours:

• Inside working hours counts fully.
• Awake but off the clock counts partially, and the two ends of the day are shaped differently. The evening starts cheap — 6 PM after work is easy to give up — but the cost accelerates toward bedtime, so 9:30 PM is already a real ask and 10:30 PM nearly a lost cause. Mornings ramp the other way: 7 AM is a genuine sacrifice, but the last half hour before your usual start is treated as being at your desk a little early — nearly as good as working hours.
• Together those curves decide who bends. If one city's evening is still early, nobody else is asked to get up before work — but once it slides past 9 PM, shaving someone else's pre-work morning becomes the cheaper trade, and the best time shifts earlier.
• Asleep is graded by depth. Just after bedtime or just before waking counts a sliver; the dead of night (midnight–6 AM local) counts against the slot — one person there cancels out one person fully at work, so a majority at their desks barely carries a time that has someone in the void.

A meeting is scored by its worst moment for each person across the full duration, and the suggestions are the highest-scoring non-overlapping windows. Daylight saving shifts are computed from each city's IANA time zone rules for the actual date you pick.