Sort plugins

Custom Field provides a sort plugin for datetime and daterange subfields, since core's sort handler expects timestamp-based storage.

custom_field_datetime

Class: CustomFieldDate

Sort handler for datetime and daterange subfields. Extends core's Date sort plugin, adapted for string-based date storage rather than UNIX timestamps, and skips timezone offset calculation for date-only subfields. Also supports granularity, allowing dates to be treated as equivalent when sorted by a coarser unit (e.g. grouping by day or month rather than the exact timestamp).