"后天"在英语中可以用"the day after tomorrow"表示。
"the day after tomorrow" 来源于英语中的"tomorrow"，"tomorrow"表示"明天"，而"the day after tomorrow"则表示"后天"。
例句：
I'll see you the day after tomorrow. (我会在后天见你)
The meeting has been rescheduled for the day after tomorrow. (会议已经改为后天举行)
I'm going on vacation the day after tomorrow. (我后天就要出去度假了)