Dates

May 1768
1 May 1768 – our standard form
September–October 1789
from 1967 to 1970
1960s counterculture; sixties [not 60s or ’60s] counterculture
the 1980s and 1990s
mid-1970s American culture    
the late twentieth century; late-twentieth-century Kenya
the mid-eighteenth century; mid-eighteenth-century America

when a month + day date appears in a sentence, write it out so that it’s pronounceable, i.e., “The events occurred on August 16th.” “They convened on December 2nd.” 

When inclusive years appear in titles, give the full years, i.e.,1752-1796

always repeat the last two digits of inclusive numbers; if more than two digits change, give the whole numbers; in titles, however, years are always given in full, 
A.D. 873 [abbreviation A.D. precedes year]; the year 640 C.E. 
But B.C. follows the year, 43 B.C.

5:00 a.m.   6:30 p.m.  (no space)
9:30 a.m., but nine thirty in the morning (CM15 15.44)

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