Hi Chris,
It is generally accepted that the best time to view anything is when it is furthest from the moon (so to speak) as the moon washes out nearby objects.
And although the moon then is three days past last quarter, it will still be brightish.
Also, as Dan has indicated, the date and time you quote is absolute. At that time it will be on the other side of the Earth and not visible from Perth.
If you look at page 123 you can find that from Perth, Saturn does not even rise until 1:44am WST.
It will probably be best to wait closer to New Moon (20 Jan) to view Saturn, but again as Dan has said, it will be just before morning twilight.
Good Hunting.....it will be worth the effort
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