It's time to let go of the past.

该忘掉过去了。

《牛津词典》

And I understand. But boy it's time to let go.

但是，我的男孩，现在是让往事随风而去的时候了。

youdao

We had our fun but it's time to let go and just be happy that we had it while we did.

我们曾经从中得到欢乐，但现在是放手的时候了。让我们满足于曾经拥有的快乐时光吧。

youdao

Let's do it, we've been waiting for a long time to go for a drink.

那就去吧，我们好久没好好喝一杯了。

How about 实战 - SpeakingMax英语口语达人

It's time to let go of that carefully constructed (and false) image of yourself as being a rock.

CNN: STORY HIGHLIGHTS

That new search interface is a start, but it's time to let go of the SD customer and start seriously designing for the 16:9 HD display.

ENGADGET: Ten years of TiVo: how far we haven't come

"Yeah, I think it's time to let everything go and it was probably too long in getting it here, " he said.

WSJ: Anthony flops in Knicks' 117-94 loss to Nuggets