Historical clock change

Lord Howe TV guide clock change on 06 April 2025

The local time 01:45 on 06 April 2025 is repeated in Australia/Lord_Howe. Use an explicit offset when mapping the affected programme.

The local time 01:45 on 06 April 2025 is repeated in Australia/Lord_Howe. Use an explicit offset when mapping the affected programme.

What the time zone rules produce

Historical IANA example for Australia/Lord_Howe with a 30-minute wall-clock change.
MomentLocal schedule timeUTC
One second before the change2025-04-06 01:59:59 +112025-04-05 14:59:59 UTC
At the change2025-04-06 01:30:00 +10302025-04-05 15:00:00 UTC

The same wall time refers to two instants

Both examples show 01:45 in Australia/Lord_Howe on the named date.
Explicit XMLTV-style startCorresponding UTC
20250406014500 +11002025-04-05 14:45:00 UTC
20250406014500 +10302025-04-05 15:15:00 UTC

If the EPG shows the wrong slot

Keep the original offset or UTC instant to determine which showing the source means. A global offset would move unrelated programmes.

Sources and further reading