I dreamt that a person i dont know(or couldnt see) told me i had a message on my phone. They showed me the screen and it was a dark blue background with silver stars and maybe a moon on it. I asked them what the message said and they showed me the text which read-happy full moon for the 21st march from siti. even in the dream i was wondering who siti was. i dont know anyone by this name, but there is a fullmoon in australia on march 20/21. can anyone help with this? it was extremely vivid.

The moon can have many different meanings in a dream. It can represent change or deceptiveness (because of the way the phases of the moon change), romance or madness.

Does the number 21 mean anything to you?

Siti sounds like "city". Does that have a meaning for you? Or can you think of another word that siti reminds you of that might mean something to you?

siti could be a godess of some kind. but as you said australia is a very unique place. or more likely it could be Siti the acting company. ummm........... are you into acting?