En Dashes
The most common use of an en dash is to indicate a duration. Read the sentence; if you substitute the word “to” for the dash, then the proper mark is an en dash. Actually, in a real sentence I would spell out the word “to,” but you will often find occasions outside of sentences where an en dash is the appropriate mark.
All children ages 3-10 are welcome to attend the crawdad party from 6-8 p.m. every Monday from September-November.
En dashes are commonly used with a little extra space on either side, especially when indicating a duration. Either add a little space with your kerning function, or insert a thin space on either side —do not type a whole word space with the Spacebar on either end of the en dash.
Also use an en dash instead ...
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