it wasn't due until Thursday morning 是什么意思

it wasn't due until Thursday morning 是什么意思
前后是这样的对话 M:wow,that's a big assignment we got for the English class.
M： Well,it's not as bad as it looks.it wasn't due until Thursday morning.
Q：What does the woman mean?
这一句当中的due做什么解释呢,整句又怎么翻译,谢谢解答