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businessDays

This term is proposed for full integration into Schema.org, pending implementation feedback and adoption from applications and websites.

Thing > Property > businessDays

Days of the week when the merchant typically operates, indicated via opening hours markup.
Values expected to be one of these types
OpeningHoursSpecification
Used on these types
ShippingDeliveryTime

Source

https://github.com/schemaorg/schemaorg/issues/2506