First Answer:
No, it happened as told in The Bible. No humans were there at the time so we don't know what happened. God was there from the beginning and he told us what happened during the week of creation. So, no, it's not a myth. Evolution is the myth.
Answer:Almost every religion has its own creation story, and its followers find it credible. The Christian one is primarily known in the west, but many other religious groups, such as the Hindus, have equally poetic descriptions. The appellation "myth" is generally applied to the stories which do not conform to the listeners beliefs - hence to secular scientists all creation stories are myths.
Buddhists as n example have reasoned that the question cannot be answered and feel that effort spent answering the question or determining which story is true is wasted from the efforts to acheive enlightenment.