Pocket-sized key ring calendar that resembles an Astrolabe. The Perpetual Calendar Bottle Opener displays days and dates for the next 50 years, will open your bottle cap and is small enough to conveniently keep in your pocket. What day will your birthday be on in the year 2039? The dial rotates to display any date in the next 50 years, all you do is line up the month with the year.
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