So the first due date computation is for the task itself.

所以第一个到期日的计算是任务本身。

youdao

If your plane arrives late due to bad weather or air traffic jams or strikes, then the train passengers will arrive at their destination first.

如果你的飞机因为恶劣的天气或空中交通堵塞或罢工而晚点，那么火车乘客会先到达目的地。

youdao

The first plane is due to leave on October 2.

第一架飞机定于10月2日起飞。

《柯林斯英汉双解大词典》

Poncet says a hearing due next month would be suspended as a first step and then withdrawn.

VOA: standard.2009.08.23

The first one will go out on Monday but it will be due ten days later.

周一留第一份作业,十天之内交上来

耶鲁公开课 - 博弈论课程节选

Then you have a problem set, which is due on that day, your first problem set, and the problem set is up on the website.

你们到时还要交习题册，这是你们的第一次回家练习，习题册已经上传到网上了。

耶鲁公开课 - 金融市场课程节选

The second disclosure, a quarterly notice first due out in November, will detail how much you are personally paying in fees, including charges related to any 401(k) loans.

FORBES: New Rules Provide Greater 401(k) Transparency

He said the second quarter will look better than the first due to these improvements in the industrial sector and stronger growth in agribusiness following a dismal 7.3% decline in the first quarter of 2012.

FORBES: Brazil's Finance Minister Doubts Country Makes Growth Target

Mrs Skeet discovered on Thursday that her cancer, which was not thought to have spread when the operation was first due to have been done five weeks ago, has now spread to her windpipe and was inoperable.

BBC: Girl died after surgery was postponed