If you are lucky enough to have access to the New York Times Historical Backfile database, you may notice some gaps in coverage. Rather than the usual culprits, the gaps are themselves historic:
Aug 10 – Nov 5 1978 (Pressman’s Strike)
Sep 17 – Oct 10 1965 (Newspaper Guild strike
Dec 9 1962 – Mar 31 1963 (ITU strike)
Dec 12 – Dec 28 1958 (Delivers’ strike)
Nov 30 – Dec 8 1953 (Photo-engravers’ strike)
No Sunday issues until April 21, 1861.