24MHT stands for "Twenty-four More Hours To". As this is a Leap Year we have an extra 24 hours to do with as we please. If you're a cacher, the obvious choice of activity is Caching! Either hiding or finding them works 
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Remember, always look before you leap, especially if you are taking a leap of faith.
Don't make any quantum leaps or leap in the dark. You may get hurt.
Before you know it your caching stats will grow by leaps and bounds.
You will surely leap for joy when you leap ahead of the pack.
Enjoy this extra day. It only happens every 4 years!
Happy Leap Day & Happy Caching!