最晚8点英文怎么说的

"最晚8点"在英语中可以用"no later than 8:00"来表示。

"No later than"是一个固定短语，意思是"不迟于"，常用来表示事情必须在某一时间之前完成。

例句：

Please submit your report no later than Friday. (请在周五之前提交您的报告。)
The project must be completed no later than December 31. (该项目必须在12月31日之前完成。)
The package must be shipped no later than Wednesday. (必须在周三之前发送包裹。)