在周日下午5点英语中可以说成 "at five o'clock in the afternoon on Sunday"。
"at" 是介词，表示"在"的意思；"five o'clock" 是时间，表示"5点"；"in the afternoon" 是时间短语，表示"在下午"；"on Sunday" 是时间短语，表示"在周日"。
例如：
I will meet you at five o'clock in the afternoon on Sunday. (我会在周日下午5点见你。)
The store closes at five o'clock in the afternoon on Sunday. (商店在周日下午5点关门。)
I usually take a nap at five o'clock in the afternoon on Sunday. (我通常在周日下午5点小睡。)