Use a semicolon to separate two independent clauses that are not joined by a conjunction:
- Boston is two hours northeast of Hartford; New York City is two hours south.
Place a semicolon before an adverb used transitionally between independent clauses:
- Some students arrived late; however, they were still able to register on time.
Separate items in a series with a semicolon when they contain internal punctuation:
- January consists of 31 days; February, 28; March, 31; and April, 30.
A semicolon is not interchangeable with a colon. Check carefully which you have typed on the keyboard: the colon requires the shift key; the semicolon does not.