Fix feed_valid_beyond_total_service_window in GTFS

Diagnosis

What this notice means

The feed starts more than 14 days before its first service date or ends more than 14 days after its last service date.

Operational effect

The declared validity period includes a long stretch without published service, so the feed may appear to cover dates for which it has no departures.

Scope

Report field	Type	Meaning
`feedEndDate`	string	The feed end date from feed_info.txt.
`feedStartDate`	string	The feed start date from feed_info.txt.
`serviceWindowEndDate`	string	The latest active service date across all services.
`serviceWindowStartDate`	string	The earliest active service date across all services.

Repair

1
Compare the reported feed dates and service-window dates with both calendar files.
2
Add missing confirmed service, or shorten the validity period to match the data. Keep intentional gaps only after checking their purpose.
3
Check the result
After a repair, rebuild the archive and validate it again. Confirm that the affected records are correct and that no new related notices appeared. A reviewed warning or informational notice may remain when it describes intentional, supported data.

Re-check your feed in the browserFree, no upload for a file you pick.

Sources