the parsed GTFS CSV data
Required Date of the service exception, parsed as a JavaScript Date. Originally in GTFS as a YYYYMMDD string (no time component).
Required Indicates whether service is added (1) or removed (2) on this date.
Required
Identifies a set of dates where service exception occurs.
References calendar.service_id if used with calendar.txt;
or acts as a standalone ID if calendar.txt is omitted.
Calendar Dates
Conditionally Required Explicitly activates or disables service on particular dates.
calendar.txt, it modifies the default service patterns.calendar.txtis omitted, all service dates must be listed here.