Here is the timetable published by Northern from 10 December 2023 – 6 January 2024.
Most Northern services will run at the same level as they do in the current timetable with some slight re-timing of services. See below-
Penistone Line: 17:51 from Huddersfield to Sheffield service will be removed
For further timetables see https://www.northernrailway.co.uk/travel/timetables