Dates

Introduction

Date Formats

Type Format Use
Date 18 jan 1891 normal date format
Periodfrm 18 jan 1891 to 30 mar 1894A specific period, which is inclusive, eg, the fact to which it is attached took place over the whole period
Date Phrase<anything>Any text not recognised as a valid date is classed as a date phrase. Where possible these should be avoided as date comparisons and computations cannot be done on date phrases
Range Betweenbtw 18 jan 1891 to 30 mar 1894 Signifies an event took place some time in the given range
Range Beforebefore 1 January 1891 Signifies an event before the given date
Range Afterafter 1 January 1891 Signifies an event took place after the given date
Quarter DateQ1 Jan 1891Shows a date covering a three-month period. See Quarter Dates for a detailed explanation

Date Qualifiers

Qualifier Title Use
(app) Approximate The date is not exact
(calculated)Calculated The date has been calculated from another event often an age on a census or gravestone
(estimated)EstimatedBased on an algorithm.