core + attic (Attic Area): these terms have been either deprecated from the core or extentions, or removed from pending as not accepted into the full vocabulary.

previousStartDate

Canonical URL: http://schema.org/previousStartDate

Thing > Property > previousStartDate

Used in conjunction with eventStatus for rescheduled or cancelled events. This property contains the previously scheduled start date. For rescheduled events, the startDate property should be used for the newly scheduled start date. In the (rare) case of an event that has been postponed and rescheduled multiple times, this field may be repeated.

Usage: Between 10 and 100 domains
Values expected to be one of these types
Date
Used on these types
Event

Schema Version 3.3