This page describes the values that can be passed to parameters that take a date/time value such as created_since.
These parameters will take any date or datetime value that is acceptable to the MySQL database. For example:
You can also specify a number of "days ago", "minutes ago", etc. These values consist of a number immediately followed by one of the following letters:
This service is provided by the Paleobiology Database, hosted by the Department of Geoscience at the University of Wisconsin-Madison.
If you have questions about this data service, or wish to report a bug, please contact the database administrator at firstname.lastname@example.org