Punctuation: Commas in dates

April 13, 2006: Issue 134

Use commas to set off the year in a complete date (month, day, and year):
The museum will open April 14, 2007, in Minneapolis.

When you don’t specify a day, you don’t need the commas:
The museum will open in April 2007 in Minneapolis.

The same goes for seasons. You don’t need commas to set off the year:
The museum will open in spring 2007 in Minneapolis.

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