Live time conversion and hour-by-hour comparison
This page shows the live time conversion between New York and Sydney. The hour-by-hour chart above makes it easy to find overlapping business hours for meetings or calls. Green highlights indicate standard business hours (9 AM – 5 PM) in each city.
New York and Sydney have one of the most variable time differences between any two major business cities. Because both observe DST in opposite seasons, the gap ranges from 14 to 16 hours throughout the year. During northern summer / southern winter: EDT (UTC-4) to AEST (UTC+10) = 14 hours. During northern winter / southern summer: EST (UTC-5) to AEDT (UTC+11) = 16 hours. Spring and fall transitions create brief 15-hour gaps.
The extreme gap means you're virtually always scheduling across calendar days. A 9 AM Monday meeting in New York is 12 AM (midnight) Tuesday in Sydney during the 15-hour gap period. The only workable real-time window: early morning New York (7-8 AM ET) catches late evening Sydney (9-10 PM AEST) — or late evening New York (8-9 PM ET) catches morning Sydney (11 AM-12 PM AEDT).
US-Australia financial connections are significant. Australian mining giants (BHP, Rio Tinto) are listed on both the ASX and NYSE. Sovereign wealth and pension fund coordination between US institutional investors and Australian super funds requires cross-time-zone communication. The resource sector in particular requires overnight awareness — commodity price movements in New York affect Australian mining stocks the following morning.
The most successful US-Australia teams adopt strict asynchronous workflows with one fixed weekly overlap call. Video recordings replace meetings where possible. When real-time calls are necessary, the standard approach: alternate the pain. One week: 7 AM ET / 10 PM AEDT. Next week: 8 PM ET / 11 AM AEDT. Document everything so that no critical decision depends on a synchronous conversation.