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Date input should indicate to users the system's interpretation of 1 and 2 digit years
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Description

The system interpretation of dates that contain years made out of 1 or 2 digits (e.g. MM-YY or MM-Y) is not clearly indicated to users.

For example: a user could attempt to look for events that took place on the 31st of January, and subsequently enter 31-01. The fact that the system interpretation of that value is actually January of the year 31 is not apparent in the UI.

Solution idea: Use an era marker to indicate BCE and CE besides the years in the parsedValue string.

Event Timeline

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Sarai-WMDE renamed this task from Date input: Indicate the system interpretation of valid 4-digit dates to Date input should indicate the system interpretation of valid 4-digit dates.Apr 14 2021, 4:09 PM

Yeah, we could make the UI explicitly state "CE" for all those dates of the Common Era with one- or two-digit years, in line with https://en.wikipedia.org/wiki/WP:BCE

One- and two-digit years may look more natural with an era marker (born in 2 AD or born January 15, 22 CE, not born in 2 nor January 15, 22).

This might solve a number of potential confusions.

Sarai-WMDE renamed this task from Date input should indicate the system interpretation of valid 4-digit dates to Date input should indicate to users the system's interpretation of 1 and 2 digit years.Apr 15 2021, 8:26 AM
Sarai-WMDE updated the task description. (Show Details)

Thanks @abian! :D I applied some updates to the ticket based on your comment.

Is this ticket specifically for the query builder? If so, could you make that a bit clearer, because there's a much older ticket at T104750 for the main Wikidata UI and I nearly marked this one as a duplicate of it before seeing the query builder tag.