Guests are requested to vacate their rooms by noon on the day of departure.

房客务请在离开之日的中午以前腾出房间。

《牛津词典》

The real journey line is one which is issued on the day of departure.

最终游览行程以出发当天派发的行程为准。

youdao

The day of departure came. On June 2, at six in the morning, we boarded the ship.

出发的日子到了。六月二日，早晨六点钟，我们登上了船。

youdao

They declared Friday the "Day of Departure."

VOA: special.2011.02.05

Each night I went to bed hoping that the next morning would be the day of departure.

每晚临睡时,我都希望翌日清晨就可以离开。

耶鲁公开课 - 1945年后的美国小说课程节选

And for all Thursday's celebrations - big and small the skies in Beijing were clear and blue, a striking departure from the heavy fog of a day earlier.

VOA: standard.2009.10.01

On the day of departure, set aside an hour for provisioning.

CNN: ASIANOW - TIME Asia | Travel Watch | Do-It-Yourself Luxury on Thailand's Railways

When the day of departure came and Rousselot went to the airport to see off the members of the delegation who were returning to Argentina, his eyes filled with tears.

NEWYORKER: ?lvaro Rousselot��s Journey

The main reason being, if you've ever been in a company where someone has sent a stinker of an email on their departure day, you will see an entire office-full of people hunkering down and cringing at their desks.

BBC: Magazine