United States
10:21 PM on Sunday, May 19, 2013
Australia
1:06 PM on Monday, May 20, 2013
Countries often span multiple time zones. We are using the America/Denver and Australia/Eucla time zones. For more accuracy, choose specific cities for each location.

If you live in United States and you want to call a friend in Australia, you can try calling them between 4:15 PM and 8:15 AM your time. This will be between 7AM - 11PM their time, since Australia is 14 hours and 45 minutes ahead of United States.
If you're available any time, but you want to reach someone in Australia at work, you may want to try between 6:15 PM and 2:15 AM your time. This is the best time to reach them from 9AM - 5PM during normal working hours.
Unfortunately, there aren't any times that overlap between your normal working hours and theirs. The best we can do with the meeting planner is to expand the range to cover from 3:00 AM to 11:00 PM your time (United States).
Travel Math provides an online time zone converter for places all over the world. You can enter airports, cities, states, countries, or zip codes to find the time difference between any two locations. The calculator will automatically adjust for daylight saving time (DST) in the summer. You can use it as a meeting planner or a scheduler to find the best time to make international phone calls. World time zones have a positive or negative offset computed from Coordinated Universal Time (UTC), or Greenwich Mean Time (GMT). UTC has uniform seconds defined by International Atomic Time (TAI), with leap seconds announced at irregular intervals to compensate for the Earth's slowing rotation. The tz database or zoneinfo database uses the closest city, rather than the more common Eastern, Central, Mountain or Pacific time zones in the United States. Countries often change their daylight saving rules, so please help us stay current by letting us know if you find any pages that need updates.
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