Guide to Dates

Owned by Wiedeman, Gregory
Last updated: Nov 26, 2019 by Boyle, Jodi B
1 min read


  1. All records must have at least 1 normal date

  2. Display Dates are only required if ca. or Undated

  3. Normal date for Undated is XXXX/YYYY

Display Dates:

YEAR MONTH DAY – YEAR MONTH DAY

Months and days are optional

Single Numbers have no 0 before (1972 April 5)

Ranges are dashes (-)

Normal Dates:

YYYY-MM-DD/YYYY-MM-DD

Months and days are optional

Single Numbers ALWAYS have 0 before (1972-04-05)

Ranges are slashes (/)

Here are some Date Examples

Date

Date Normal

1912 (not needed)

1912

1942 October 24 (not needed)

1942-10-24

1934-1935 (not needed)

1934/1935

ca. 1982 December

1982-12

ca. 1990

1985/1995

1983 April 19 – 1985 December 15

1983-04-19/1985-12-15

1917 March – July

1917-03/1917-07

1950 Winter

1949-12/1950-03

1950 Spring

1950-03/1950-06

1950 Summer

1950-06-1950-09

1950 Fall (or 1950 Autumn)

1950-09/1950-12

 

For multiple dates that are not ranges (1923, 1925, 1934) use Date 2 and Date 3

 

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