One technique I remember was using the location of an object to date it, like how deep it was buried.

我记得有一种方法是利用物体的位置来确定它的年代，比如它被埋得有多深。

youdao

He crouched over Gremlin's dollop of fibrous olive dung, using a small plastic scoop to transfer a bit into a specimen tube, which he labeled with time, date, location, and Gremlin's name.

他用一把小塑料勺子将格里·莫林纤维状的橄榄色粪便铲到样品管中，然后在管上标明时间、日期、地点和格里·莫林的名字。

youdao

Once tasks are created you can check the task and change the due date, the repeat of the task, a time estimate, tags, location of the task, or a URL.

一旦任务创建，你能检查任务并能改变任务的到期日、任务的重复次数、估计时间点、标签、任务地点或网页超链接。

youdao

Public authorities can obtain other communications data without the home secretary's authority, such as the time, date and location of phone calls.

BBC: How much privacy can smartphone owners expect?

The paper said in a statement that it had obtained the image from a news agency but that it had not been able to independently verify the date, location or circumstances of the photo.

BBC: Spain's El Pais apologises for false Hugo Chavez photo

The match is struck the second outsiders learn of a betrothal: A bride-to-be, especially, becomes public property and an age-old archetype and she is expected to fire off, on command, the event date and location, number of guests, maker of dress and, by golly, she had better loft that ring finger for inspection.

CNN: What's with public marriage proposals?