The days of the week and months of the year should
always be capitaized in text.
• On Thursday afternoons, Judith mows
the Patterson-Smiths’ enormous lawn.
• Eight Januaries ago, a little boy was
born in Cook County hospital.
In text, write out the words in full. Elsewhere, they
may be abbreviated.
ante meridiem (before
noon) a.m.
post meridiem (after noon) p.m.
You can abbreviate ante meridiem and post
meridiem either with lowercase letters and periods (a.m.,
p.m.) or with small caps (am, pm).
If you use a.m. or p.m., saying in
the morning or in the evening is redundant.
• Let’s meet at Bowlmor at 11 p.m.
• Let’s meet at Bowlmor at eleven in
the evening.
