Wikidata:WikiProject Calendar Dates

Purpose

Improve items for calendar dates, such as December 16, 2017 (Q37788141).

Initial focus is on 2017/2018, then the last 50 years back and the next 5 into the future.

The participants listed below can be notified using the following template in discussions:
{{Ping project|Calendar Dates}}

Title	ID	Data type	Description	Examples	Inverse
instance of	P31	Item	instance of: that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform) Wikibase value = use the following: calendar day of a given year (Q47150325)	December 16, 2017 <instance of> calendar day of a given year	-
point in time	P585	Point in time	point in time: date something took place, existed or a statement was true; for providing time use the "refine date" property (P4241) defines the date the item covers	December 16, 2017 <point in time> 16 December 2017	-
day of week	P2894	Item	day of the week: day of the week on which this item occurs, applies to or is valid	December 16, 2017 <day of week> Saturday	-
instance of	P31	Item	instance of: that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform) Wikibase value = use the applicable day/month combination	December 16, 2017 <instance of> December 16	-

Title	ID	Data type	Description	Examples	Inverse
instance of	P31	Item	instance of: that class of which this subject is a particular example and member; different from P279 (subclass of); for example: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform) Wikibase value = use the following: calendar month of a given year (Q47018478)	January 2018 <instance of> calendar month of a given year	-
point in time	P585	Point in time	point in time: date something took place, existed or a statement was true; for providing time use the "refine date" property (P4241) defines the date the item covers	January 2018 <point in time> January 2018	-