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Time Difference: Boston to Sydney

🇺🇸BostonUTC-5
vs
🇦🇺SydneyUTC+10
🇺🇸
Boston, US
Wed, Oct 7
🇦🇺
Sydney, Australia
Thu, Oct 8

Click a time to convert

Time Difference
15 hours
Sydney is 15 hours ahead of Boston
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🇺🇸
Boston
View city page
🇦🇺
Sydney
View city page

Boston vs Sydney timezone guide

Boston (US) uses the America/New_York timezone at UTC-5, while Sydney (Australia) uses Australia/Sydney at UTC+10. This means Sydney is 15 hours ahead of Boston (based on standard offsets — the live difference above accounts for daylight saving time).

Best meeting times between Boston and Sydney

Standard 9-to-5 working hours in Boston and Sydney do not overlap. To meet synchronously, one side will need to start early or stay late — see the hour-by-hour planner below for the least disruptive options.

Hour-by-hour planner

BostonSydneyStatus
6am9pmBoston early, Sydney evening
7am10pmBoston early, Sydney late evening
8am11pmBoston early, Sydney late evening
9am12amBoston working hours, Sydney asleep
10am1amBoston working hours, Sydney asleep
11am2amBoston working hours, Sydney asleep
12pm3amBoston working hours, Sydney asleep
1pm4amBoston working hours, Sydney asleep
2pm5amBoston working hours, Sydney asleep
3pm6amOne side outside 9-to-5 but still awake
4pm7amOne side outside 9-to-5 but still awake
5pm8amBoston evening, Sydney early
6pm9amOne side outside 9-to-5 but still awake
7pm10amOne side outside 9-to-5 but still awake
8pm11amOne side outside 9-to-5 but still awake
9pm12pmOne side outside 9-to-5 but still awake
10pm1pmBoston late evening, Sydney working hours

Green = standard working hours (9 AM – 5 PM). Amber = early (6–9 AM). Orange = evening (5–10 PM). Grey = asleep or late.

Daylight saving time between Boston and Sydney

Both cities observe daylight saving time, but on different schedules. This creates short windows each year where the usual difference of 14 hours behind temporarily shifts.

  • Dec 31 → Mar 8Difference temporarily 16 hours behind.
  • Mar 8 → Apr 4Difference temporarily 15 hours behind.
  • Oct 3 → Nov 1Difference temporarily 15 hours behind.
  • Nov 1 → Dec 31Difference temporarily 16 hours behind.

Boston transitions on March 8, 2026 and November 1, 2026. Sydney transitions on April 5, 2026 and October 4, 2026.

Distance between Boston and Sydney

Great-circle distance
16,240 km
Direct flight time
~20h 6m

Boston and Sydney are 16,240 km apart along the great-circle route. A direct flight takes roughly ~20h 6m, depending on aircraft type, winds, and routing.

More comparisons

Boston to New YorkBoston to LondonBoston to TokyoSydney to New YorkSydney to LondonSydney to TokyoSydney to Dubai

Frequently asked questions

What is the time difference between Boston and Sydney?
The current time difference is 15 hours. Boston is currently 15 hours behind Sydney.
Is Boston ahead of Sydney?
No. Boston is currently 15 hours behind Sydney.
What time is it in Sydney when it's 9 AM in Boston?
When it's 9 AM in Boston, it's 12am in Sydney.
When is the best time to schedule a meeting between Boston and Sydney?
Standard 9-to-5 working hours in Boston and Sydney do not overlap. To meet synchronously, one side will need to start before 9 AM or work past 5 PM — see the planner above for the least disruptive options.
Do Boston and Sydney observe daylight saving time?
Boston and Sydney both observe daylight saving time, but on different schedules. Short windows each year (a week or two around each set of transitions) produce a temporarily different offset.
How far apart are Boston and Sydney?
Boston and Sydney are 16,240 km apart along the great-circle route. A direct flight takes roughly 20 hours 6 minutes.