Stay sharp all year with a calendar packed with puzzles designed for brain fitness.PUZZLES TO KEEP YOUR BRAIN SHARP: Keep your new year's resolution to keep your brain fit with a brand-new calendar that's jam-packed with puzzles designed to strengthen concentration, short-term memory, attention to detail, and processing speed. ENTERTAINING TRAINING: Enjoy a variety of fun logic puzzles, number and word games, visual brainteasers, and more, including Pattern Recall, number game Futoshiki, and Change a Letter. Each day's puzzle specifies the brain function it works out, so you'll know why you're playing. ​NOW PLASTIC-FREE!: Page-A-Day(R) Calendars are environmentally friendly! Printed on responsibly sourced paper and 100% recyclable, with sturdy cardboard backers.