Epidosis created this task.
Epidosis added a project: Wikidata.
Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION
  Dates with precision lower than month (10), mainly dates with year precision 
(9) - but also century (7) and others -, could be encoded in different ways, 
thus falsely duplicating values and generating single-value constraint 
violations. This is a known problem also affecting the use of QuickStatements 
(https://www.wikidata.org/w/index.php?title=Help:QuickStatements&oldid=1657403335#Removing_statements),
 whose users should take into account both formats instead of one of them.
  
  For year precision (9): yyyy-01-01 vs yyyy-00-00
  
  - https://www.wikidata.org/w/index.php?title=Q65174527&oldid=1663810999
  - https://www.wikidata.org/w/index.php?title=Q60391412&oldid=1663738709
  - https://www.wikidata.org/w/index.php?title=Q63869992&oldid=1663779113
  
  The proposal is: allowing only one format and uniforming all existing dates 
with precision lower than 10 to that format.

TASK DETAIL
  https://phabricator.wikimedia.org/T310981

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Epidosis
Cc: Aklapper, Epidosis, Astuthiodit_1, karapayneWMDE, Invadibot, maantietaja, 
ItamarWMDE, Akuckartz, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, 
LawExplorer, _jensen, rosalieper, Scott_WUaS, Wikidata-bugs, aude, Mbch331
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