Historical clock change

Chatham TV guide clock change on 28 September 2025

The local time 03:15 on 28 September 2025 is skipped in Pacific/Chatham. Use an explicit offset when mapping the affected programme.

The local time 03:15 on 28 September 2025 is skipped in Pacific/Chatham. Use an explicit offset when mapping the affected programme.

What the time zone rules produce

Historical IANA example for Pacific/Chatham with a 60-minute wall-clock change.
MomentLocal schedule timeUTC
One second before the change2025-09-28 02:44:59 +12452025-09-27 13:59:59 UTC
At the change2025-09-28 03:45:00 +13452025-09-27 14:00:00 UTC

The missing wall time cannot represent a programme instant

The clock moves from 02:45 to 03:45 at the boundary. Round-tripping 03:15 from local time through UTC finds no matching instant.

If the EPG shows the wrong slot

Ask for a corrected local time or the explicit UTC instant. Check the exporter before shifting the whole guide.

Sources and further reading