回答

・preferred date
・convenient day

我要約朋友去吃飯，想問朋友：「請告訴我希望的日期。」
I'm going to have dinner with a friend, so please tell me your preferred date?
preferred date = 希望的日期　

ex.什麼時候去吃東西才方便？
When is it convenient for you to go out for a meal？
convenient = 方便　
go out for～ = 去外面做～　

ex. 您想要哪一天？
What day would you prefer？

有幫助｜0