org-read-date-minibuffer-setup-hook

org-read-date-minibuffer-setup-hook is a variable defined in `org.el'.
Its value is

nil

• This variable is obsolete since 24.4;
  Set `org-read-date-minibuffer-local-map' instead.
• This variable may be risky if used as a file-local variable.

Documentation:
Hook to be used to set up keys for the date/time interface.
Add key definitions to `minibuffer-local-map', which will be a
temporary copy.

WARNING: This option is obsolete, you should use
`org-read-date-minibuffer-local-map' to set up keys.

You can customize this variable.