What_the date yesterday

填was.
What is the date today.的意思是 今天多少号。
What was the date yesterday.的意思是 昨天多少号。
因为昨天属于过去时，所以应用be动词的过去式was.

was

你什么意思？翻译还是问题？
翻译的话是：昨天是几号？
如果是问题，你自己查日历吧

What was the date yesterday?