You need to enrol before the end of August.

你必须在八月底前注册。

《牛津词典》

I filled in whatever they sent me, and I returned like at the end of August.

我把他们寄给我的东西都填好，在八月底左右就回来了。

youdao

The trees on the wood-edge were a darkish, brownish green in the full light—for it was the end of August.

在充足的光线下，树林边缘的树木呈现出一种暗棕色的绿色——因为已经到八月底了。

youdao

"Worst-case scenario, if I don't find a job by the end of August, I move back with my parents."

VOA: special.2010.06.11

and may come again like, towards like the end of August, it gets quite hot

可能热浪会再次来袭，一直到八月底，那会相当热，

关于伦敦的天气 - SpeakingMax英语口语达人

He survived the Battle of the Wilderness, the Battle of Spotsylvania Court House, the Battle of Cold Harbor, the entire Siege of Petersburg from August of '64 all the way until the end of March of 1865.

他在荒地战役中存活了下来,经历了波特瑟尔韦尼亚县府战役,和冷港战役,从1864年8月的彼得斯堡包围战,直到1865年五月底

耶鲁公开课 - 美国内战与重建课程节选

At the end of August, a very patient reader named Stephanie sent me an interesting question.

FORBES: I've Tracked My Expenses -- Now What?

Since the end of August, the large-cap index has appreciated by more than 12%.

FORBES: AAII: Putting Financial Statistics In Context

This year, Alabama and Mississippi passed laws barring schools from opening before the end of August.

WSJ: School in August Gets Low Grades