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Class 1B - Regional System Timetables

Worldwide Edition (North American edition)

1950s 1960s 1970s 1980s
1970 April 1 Aug 1 Nov 1
1971 Jan 1 April 1 June 15 Nov 1
1972 Jan 1 April 1 May 15
1973 April 1 June 1 Aug 1 Nov 1
1974 Jan 1 April 1 June 1 Aug 1 Nov 1
1975 Jan 1 April 1 May 15 Nov 1
1976 April 1 July 1 Nov 1
1977 Jan 15 April 1 June 15 Nov 1
1978 Jan 15 April 1 July 1 Nov 1
1979 Jan 15 Nov 1

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Updated September 7, 2024