I hope you'll remember the good old days which we spent together in junior high though it's time to say goodbye.

我希望你会记得我们在初中一起度过的美好时光，尽管是时候说再见了。

youdao

After about an hour of chat, it's time to say good bye.

聊了大约一个小时，该说再见了。

youdao

I left in such a hurry that I didn't have time to say good-bye to you.

临行匆忙，未能向你告别。

《新英汉大辞典》

If that is not something you want done with your deterrent, now would be a good time to say so.

CENTERFORSECURITYPOLICY: Your Deterrent: What's at stake at the Moscow summit

"This is not a time to sit back and say enjoy the good news, " he said.

WSJ: Thompson Turns to Bratton

But hawks led by Madeleine Albright, the secretary of state, believe that he has caused so much mayhem in the Balkans that it is time to pull the rug from under him in Kosovo, and say good riddance to his presidency as well as to Serbian rule over the province.

ECONOMIST: A war too far for Milosevic