: What is the proper way to write a date containing two days in a row? I have a presentation that will go from August 4th to the 5th. On my title slide I'd like to list the dates in the

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I never use ampersands in copy unless they're part of a proper company name (e.g., Johnson & Johnson). It just looks lazy to me. I would write it as "August 4–5," because the presentation is taking place on two consecutive days. (Nobody assumes it's a 48-hour presentation.)

I would use "and" if the dates are not contiguous: "The concerts will be held on August 4 and 6."

If you were asking this on Graphic Design SE, you could argue that you could use an ampersand as a design element, or to save room if space is at a premium. But for a slide title? No.

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Either of those is fine ("&" is just another way to write "and") and will be understood. Another formulation you'll sometimes see is "Aug 4-5, 2011", but this is better for things that are continuous, like a convention. I assume your presentation will be in two parts, one on Aug 4 and the other on Aug 5, and that in between you'll be doing other stuff (eating, socializing, sleeping...).

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