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endDate

A Schema.org Property
Thing > Property :: endDate
The end date and time of the item (in ISO 8601 date format).
Values expected to be one of these types
Date
DateTime
Used on these types
CreativeWorkSeason
CreativeWorkSeries
EducationalOccupationalProgram
Event
MerchantReturnPolicySeasonalOverride
Role
Schedule

Source

https://github.com/schemaorg/schemaorg/issues/2486