A.1. Document has a supplied dateline date - WaxCylinderRevival/frus-dates-project GitHub Wiki

A supplied dateline date is a date printed in the dateline in the original publication.

A.1.1. For single dates (such as January 1, 1918 or November 2, 1944, 5 p.m.), use @when

A.1.1.1. Examples:

<date when="1950-06-08" calendar="gregorian">June 8, 1950</date>
<date when="1969-04-01" calendar="gregorian"
  ana="#date_imprecise-inferred-from-outside-research"
  >1969</date>
<date when="1971-01-22T17:27:00+00:00" calendar="gregorian"
  >January 22, 1971, 1727Z</date>
<date when="1862-04-14T15:00:00-04:56" calendar="gregorian">
  April 14, 1862—3 p. m.</date>

A.1.2. For concrete date ranges (such as December 8-10, 1945 or June 3, 1951, 11 a.m.-1 p.m.), use @from/@to

A.1.2.1. Examples:

<date from="1943-01-22" to="1943-01-23" calendar="gregorian"
  >January 22–23, 1943</date>
<date from="1957-02-07T15:30:00-05:00" 
  to="1957-02-07T19:30:00-05:00" 
  type="conversation-or-meeting-date" 
  calendar="gregorian">
    February 7, 1957, 3:30–7:30 p.m.</date>

A.1.3. For imprecise dates for which a single date cannot be determined (such as May 1921), use @notBefore/@notAfter/@when/@ana

A.1.3.1. Examples:

<date notBefore="1915-04-01T00:00:00+00:00" 
  notAfter="1915-04-30T23:59:59+00:00" 
  ana="#date_imprecise-inferred-from-date-rules" 
  when="1915-04" calendar="gregorian">
      <hi rend="italic">April 1915</hi>
</date>
<date notBefore="1966-06-29T00:00:00-04:00" 
  notAfter="1966-06-30T23:59:59-04:00" 
  ana="#date_imprecise-inferred-from-sibling-dates" 
  when="1966-06" calendar="gregorian">June 1966</date>

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