I'm using a setup with biblatex/natbib and bibtex and I would like to add day and month to the bibliography. Is there a simply way to do this?

With my MWE below, I currently get - with not day and month,

ga me data a mont



  title = {This is a Title},
  author = {Author, Some},
  note={This is a note about this specific version}
  date = 2005,
  month = feb,
  day = 14,


Cf. \citep[19]{Book}.


  • Doesn't date = {2005-02-14} work? day is not a recognised field. And if you use date it overrules the month.
    – moewe
    Mar 3 '17 at 14:57

You will want to use the date field with YYYY-MM-DD format.

  title  = {This is a Title},
  author = {Author, Some},
  note   = {This is a note about this specific version},
  date   = {2005-02-14},

But then you will still not see the full date in the bibliography. This has to do with the mergedate settings, see https://github.com/plk/biblatex/issues/520

At the moment, mergedate=false, minimum or basic will give you the full date.

  • Thank you for your prompt response. Simply adding ` mergedate=false` solved my problem. I have all my bib entries with day and month.
    – Eric Fail
    Mar 3 '17 at 15:12
  • @EricFail Ah yes, it could be that BibTeX still supports day. It is not officially supported any more, however, and Biber ignores it now.
    – moewe
    Mar 3 '17 at 15:14
  • Interesting. Thanks. I've mostly gone with whatever BibDesk invited me to do. I'll look into the recommended approach. Again, thank you for your help!
    – Eric Fail
    Mar 3 '17 at 17:21
  • 1
    @EricFail I'm not familiar with citation managers. But maybe BibDesk has a dedicated biblatex-mode. I have seen situations where citation managers would deliver sub-par output. The recommended format can be found in the biblatex documentation. But of course that is a lot to stomach.
    – moewe
    Mar 4 '17 at 11:26

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