You might look and see if you can find an Australian/Oceanic based guild. Their prime time is NA night time.
<Skål> [PC/NA]- An End Game Content Guild for Everyone Stormproof: Vibeke - 50 EP mDragonknight | Savi Dreloth - 50 EP Magsorc | Sadi Dreloth - 50 EP Magblade | Sigtric Stormaxe - 50 EP Stamsorc | Valora Dreloth - 50 EP Magplar | Sigtric the Unbearable 50 EP Stam Warden Scrub: Chews-on-Beavers - 50 EP DK Tank | Vera the Wild - 50 EP magicka Warden | Sigtric the Axe - 50 EP Dragonknight Crafter | Sigtric the Blade - 50 EP Lost Nightblade | Sigtric the Savage - 50 EP magicka Templar | Vibeka Shadowblade - 50 Ep Stealthy Ganky Nightblade |
My RP guild, Magicka, is recruiting, if you're interested. Link Here if you want to learn more, or send me a message on xbox live for an invite or more info (gamertag: Senpai Fluffy). I don't know if we're "late night" or late night per your standards, but we'd love to have you!