Eastern time this Wednesday.
This initial stage of the eclipse won't be seen in Western Australia because of its position, but those in Perth will see the moon changing colour to russet red as it rises shortly after sunset at 5.44pm.
On the 26th, the Flower Moon will also be a supermoon.
The lengthy name is the result of a few astronomical phenomena coming together at once. The first total lunar eclipse in two years is happening at the same time as the moon is closest to Earth, in what astronomers say will be a once-in-a-decade show.
For example, the Virtual Telescope Project will provide a live feed in the early hours of Wednesday morning, ahead of the appearance of the spectacular "super flower blood moon".
Where things get interesting - and odd - is when the Moon moves into the Earth's umbra, where direct light from the Sun is totally blocked out by the Earth. The eclipse is "super" because the Moon will pass near to its orbital perigee - its closest point to Earth - making it appear large and bright in the sky (the Moon will appear about 7% larger than normal).
Why it's "flower": Full moons that occur in May are sometimes known as flower moons.
European Space AgencyTotal lunar eclipse on January 21, 2019.
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Lowell Observatory broadcasts a total lunar eclipse from Flagstaff, Arizona. Supermoons are more common - they typically occur several times a year.
'The same effect that gives the sky its orange glow in the morning or afternoon will cause that on the moon - essentially you're seeing sunrise on the moon'.
But whether you can see the total lunar eclipse - when the moon will turn a blood red - is another story.
According to NASA's website, the total eclipse will be visible near moonset timing in the western continental United States, Canada, Mexico, most of Central America and Ecuador, western Peru, southern Chile and Argentina. So for people in PDT (Pacific Daylight Time), the eclipse is set to start at 4:11 a.m. local time on the morning of May 26.
The total lunar eclipse will last about 15 minutes.
Stargazers across the Pacific Rim can cast their eyes skyward on Wednesday night and behold a "Super Blood Moon", as the heavens align to bring a rare celestial twin treat. It won't be visible in New England and parts of New York, Pennsylvania and Delaware.
According to Old Farmers' Almanac, the full moon is the time of flowering in many parts of North America, so it is called the "Flower Moon" in May.
"Technically, the November event will be partial, but only the thinnest sliver of the Moon's disk will remain outside the umbra, so for all intents and purposes it'll be very much like a total eclipse", she said in a statement.