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Thursday Code Puzzler: How Many Weekends?

Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.

Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!

Do you have code puzzlers that you'd like to share with the DZone community?  If so, please submit here. 

How Many Weekends?

Write a function that takes two dates and returns the number of weekends between those dates. If either of the start or end dates is a weekend, you can count that. And whether it's a Saturday or Sunday (doesn't need to include both), it counts.

Catch up on all our previous puzzlers here.

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