The numeric value of a day of the month, in two-digit form as it would be stated as the “DD” in the international date format YYYY-MM-DD, for example, “03”, “25”.


Used in both article metadata and within bibliographic references <citation> and <nlm-citation>. For extensive examples of formatted <nlm-citation>s including use of <day>s in <nlm-citation>s, see: Sample PubMed Central Citations. To see tagged versions of these examples, see: Sample PubMed Central Citations - XML Tagged.

Model Description

Text, numbers, or special characters.

Tagged Examples

Example 1

In article metadata

<article-id pub-id-type="pmid">...</article-id>
<aff id="StLukes">...</aff>
<pub-date pub-type="pub">
<date date-type="accepted">
<copyright-statement>Copyright &#x00A9; 1999, British
Medical Journal</copyright-statement>
<p>To examine the effectiveness of
day hospital attendance in prolonging independent living for elderly

Example 2

In a NLM-style bibliographic citation

<nlm-citation citation-type="journal">
<collab>The Royal Marsden Hospital Bone-Marrow Transplantation Team</collab>
<article-title>Failure of syngeneic bone-marrow graft without preconditioning in post-hepatitis marrow aplasia</article-title>