# Appendix 1: Acceptable date formats

<table data-full-width="false"><thead><tr><th>Type</th><th>Acceptable</th><th>Unacceptable</th></tr></thead><tbody><tr><td>Single year</td><td>1970</td><td>'70</td></tr><tr><td>Month and year</td><td>April 1970</td><td>Apr 1970<br>04/1970<br>04/70</td></tr><tr><td>Day, month and year</td><td>01 April 1970</td><td>1 April 1970<br>01/04/1970</td></tr><tr><td>Year range</td><td>1970-1972</td><td>1970 - 1972<br>1970-72<br>1970 - 72</td></tr><tr><td>Month and year range</td><td>April-June 1970</td><td>April - June 1970<br>Apr-Jun 1970</td></tr><tr><td></td><td>April 1970-August 1972</td><td>April 1970 - August 1972<br>Apr 1970 - Aug 1972</td></tr><tr><td>Century range</td><td>19th century-20th century</td><td>19th-20th centuries<br>19th - 20th century</td></tr><tr><td>Estimated date</td><td>1970s</td><td>1970's</td></tr><tr><td></td><td>c.1970</td><td>c. 1970<br>c.1970s<br>c 1970</td></tr><tr><td></td><td>20th century</td><td>20th c.<br>20th cent.</td></tr><tr><td></td><td><a data-footnote-ref href="#user-content-fn-1">Early</a> 20th century</td><td></td></tr><tr><td></td><td><a data-footnote-ref href="#user-content-fn-2">Mid </a>20th century</td><td></td></tr><tr><td></td><td><a data-footnote-ref href="#user-content-fn-3">Late </a>20th century</td><td></td></tr><tr><td></td><td>19th century-early 20th century</td><td></td></tr><tr><td></td><td>Early-mid 20th century</td><td>Early-Mid 20th century<br>Early 20th century-mid 20th century</td></tr><tr><td></td><td>Mid-late 20th century</td><td></td></tr><tr><td>Range with specific and estimated date</td><td>1953-1960s</td><td></td></tr><tr><td></td><td>c.1970-2005</td><td></td></tr><tr><td>Range with estimated dates</td><td>c.1953-c.1968</td><td></td></tr><tr><td></td><td>1930s-1960s</td><td></td></tr></tbody></table>

[^1]: 1900-1939

[^2]: 1930-1969

[^3]: 1960-1999