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byDay

A Schema.org Property
Usage: 1K - 10K Domains Based on monthly aggregations from Google's web index. (Google - August 2026)
Thing > Property :: byDay
Defines the day(s) of the week on which a recurring Event takes place. May be specified using either DayOfWeek, or alternatively Text conforming to iCal's syntax for byDay recurrence rules.

Values expected to be one of these types

Used on these types

Source

https://github.com/schemaorg/schemaorg/issues/1457