- Use a colon to separate hour from minutes. The colon and minutes are not necessary for even-hour times.
11 a.m. (not 11:00 or 11:00 a.m.)
- In listings, use the following model to specify a time range:
5:30–8:30 p.m. (note the en dash)
10 a.m.–1:30 p.m. (note the en dash)
- In text, use the following model to specify a time range:
from 5:30 to 8:30 p.m. (not from 5:30–8:30 p.m.)
from 10 a.m. to 1:30 p.m. (not from 10 a.m.–1:30 p.m.)
- Use noon and midnight, not 12 noon or 12 a.m., or 12 midnight or 12 p.m. In formal invitations, you may elect to use the following model:
- See also en dash.