A uniform one-hour difference often points to time-zone, daylight-saving or guide-offset handling. Check the device clock and region first, then any player-specific EPG offset. Changing channel mappings is unlikely to fix a schedule that is displaced by the same amount everywhere.
Check the actual device time
Open the operating system’s date and time settings and compare them with local time. A manually entered time can be wrong even when the time-zone label looks correct. Automatic time and automatic time zone are separate controls on some devices.
Avoid applying the correction twice
A player may already interpret offsets embedded in guide timestamps. Adding another manual adjustment can create the very error you are trying to fix. Note the original setting and change one offset at a time, using a currently airing programme as the reference.
Distinguish global and regional errors
If a single channel differs while others are correct, it may be mapped to a different regional edition or a delayed feed. Leave the global time setting alone in that case. Record the channel and displayed programme so support can review its mapping.
