2H. Date of Execution of Unpublished Material

2H1. Give the date or span dates of execution as a year or years. Optionally, for single items, include month and day as found on the material.

1996 UPDATE: Optionally, for collections, indicate dates or date spans most heavily represented within the collection as a bulk date.

Examples

2H2. Add the copyright date following the date of execution if they differ.

1996 UPDATE: Optionally, add the copyright date following the date of execution even if the dates are the same, to reflect copyright status of the material.

Examples

2H2.1 1996 UPDATE: Optionally, for photographs, add the date of printing or publication when it differs significantly from the date when the image (i.e., negative) was made.

Example

2H3. When the date of execution is an integral part of the transcribed title on a single item, transcribe it as such, and repeat it in square brackets as the date element in the publication, distribution, etc., area (see 1A3, 1B1.1).

Example

2H4. No Date of Execution

When no date is known, supply a probable date according to the patterns shown in Appendix A, or use the known date of copyright. Give any necessary explanation in the note area. Use the abbreviations "ca." ( circa) and "c" (copyright), writing them in the lowercase.

Examples

2H5. As a last resort with single items, for which no date can be conjectured, use the abbreviation "n.d." (no date) to indicate this.

1996 UPDATE: Optionally, always devise a date to provide some chronological information even if it is only an estimate of several centuries.

2H6. Open-ended Collections

1997 UPDATE: Follow rule 2F7 with unpublished material.