date: Date of source being referenced. Can be full date (day, month, and year) or partial date (month and year, season and year, or year). Use same format as other publication dates in the citations.[date 1] Required when year is used to disambiguate {{sfn}} links to multiple-work citations by the same author in the same year.[more] Do not wikilink. Displays after the authors and is enclosed in parentheses. If there is no author, then displays after publisher. For acceptable date formats, see Help:Citation Style 1#Dates.
For approximate year, precede with "c. ", like this: |date=c. 1900.
For no date, or "undated", add as |date=n.d.
year: Year of source being referenced. Use of |date= is recommended unless all of the following conditions are met:
The template uses |ref=harv, or the template is {{citation}}, or |mode=cs2
orig-year: Original publication year; displays after the date or year. For clarity, please supply specifics. For example: |orig-year=First published 1859 or |orig-year=Composed 1904.
↑Publication dates in references within an article should all have the same format. This may be a different format from that used for archive and access dates. See: .
