Before you begin this section, you should have completed the Intermediate Querying Lesson or have a good understanding of basic Fluree queries. Completion of the Flakes and Blocks Lesson or a good understanding of flakes is also helpful. In addition, you should know about the subject-predicate-object model.
If we want to see all of the flakes that belong to a particular block, you can use a block number, an ISO-8601 formatted string or an ISO-8601 formatted duration.
Using block number:
Using ISO-8601 formatted wall clock time:
Using ISO-8601 formatted duration (as of 1 hour ago):
Block Flakes, As Of
Use this resource on the [ISO-8601 duration format](https://www.digi.com/resources/documentation/digidocs/90001437-13/reference/r_iso_8601_duration_format.htm) to see all the flakes from 3 months, 2 days, 6 hours, and 2 minutes ago.