What is the most efficient way to get all documents that are older than 1 day?

Question

MongoDB

I know that it is possible to get its timestamp through the ObjectId of a document. But what if I need to get all the documents in the collection that are older than one day? Walking through each document and checking its ObjectId is not the best option.
Do I understand correctly that when adding to MongoDB, you need to make a field a la created_at?

Answer 1

doesn't work like that?
https://gist.github.com/guilleferrer/1669783
the field is not needed, it is only needed for specifics and normalization - for example, different zones with server time, normalized to the datetime event, etc.