Although things may not improve overnight, making a start will bring about a significant difference.

尽管事情可能不会马上有进展，但是开始行动将带来非常的不一样…

youdao

This was not an overnight thing. They needed to figure things out and try to find a happy place again.

一切都并非一夕所致，他们必须解决这些问题，并且找回快乐。

youdao

And so while there are signs that some of the things that the president is doing are starting to have effect, these problems did not get made overnight.

VOA: standard.2009.03.15

Although it will not arrive overnight, hydrogen energy has the potential to do good things.

ECONOMIST: Stepping on the gas