Translation:We will see a friend at three in the afternoon.
I wrote: "We will see a friend this afternoon at three".
It won't accept that either. What difference is there with the answer they accept: "We will see a friend at three in the afternoon."
Given you wrote your comment a year ago, duolingo seem to have abandoned making amendments to this course. Pity, it is a good system, way ahead of others in many ways, but it is being failed by lack of maintenance. Many people are very frustrated by the lack of diversity of English answers when they know they have written the correct answer in another way in English. We are not here to learn English.
Duolingo should realise that if they want paying customers, they have to have a product that is 100% and that updates and corrections just have to be part of the process.