Ambrose Bierce may have had a timeshare calendar in mind when he was quoted saying: 'Day, n. A period of twenty-four hours, mostly misspent.'
But what is a timeshare or holiday calendar? (Also called a vacation rental calendar).
A timeshare is basically a form of vacation property ownership. In other words, the use and costs of running the resort are shared among the owners.
While the majority of timeshares are condominiums or cooperatives at vacation destinations, the timeshare model has also been applied to house boats, yachts, motor homes, cruises and private jets too.
So you can share in ownership of a vacation resort or destination and, using a houseboat as an example, you use a timeshare or rental calendar to arrange and fit in your (and other owner's) vacation time on that houseboat.
You can read more about what Wikipedia says about time share here.

Taking a vacation? You'll need a holiday calendar!
I guess it's kind of like every year for your Christmas holidays you go to the same vacation resort because you love it so much, but instead of renting your 1-3 weeks of vacation, you actually became a part-owner of a small 'share' of that vacation resort.
Timesharing is a great way to either have a relaxing holiday in luxury somewhere or make some good extra side income!
This means too you have to pay some of the usage and running costs of the resort.
And if one year you know you couldn't make the trip, then you could use a timeshare calendar to let others know that your 'timeshare' or 'prescribed period' at the resort was available...
For the highest bidder!
You could then rent out that time, or give it as a gift to family or friends.
You can also spice up your knowledge on a few 'how to benefit from timeshare' resources you'll see below.
Discover how to exchange your timeshares into the best international resorts in the world!
The Timeshare Exchange Bible 2nd Edition reveals what most timeshare owners will never learn in a lifetime.
With this timeshare guide, you'll be able to:
Here's a few cool benefits to this timeshare bible:
Discover 21 secrets that will supercharge your exchange power for any level of timeshare, giving you a much-needed edge when exchanging.
Allow you to exchange into high demand areas such as Hawaii and Caribbean - (Finally take that dream vacation you've always promised yourself!)
Learn what to do to get the best view suite. You've finally exchanged into a great resort, now make sure you're looking at the ocean, not the dumpster in the parking lot!
Exchange into Premier Resorts even if you don't own one!
And, exchange your smaller unit into a larger one and stay in a larger unit than you own without having to pay extra!