Someone asked me on twitter for the dates of the shortlist announcements. Investigation on the CWA's site indicates the following:
The Daggers are being announced in two groups.
The shortlists for the Gold Dagger for Non-Fiction, Dagger in the Library, International, Short Story and Debut Daggers will be announced at Crimefest (Bristol 20-23 May) and the Daggers will be awarded at the Theakstons Old Peculier Crime Writing Festival in Harrogate (22-25 July).
The shortlists for the John Creasey (New Blood), Ian Fleming Steel and Gold Daggers will be announced at Harrogate and the Daggers will be awarded at a televised ceremony in the Autumn, as part of the Specsavers ITV3 Crime Thriller Awards.