Calendar Clock Dementia Clock is a tool for managing your daily agenda, which is an indispensable tool for every person. Whether you need to manage your personal or professional life, this simple tool will be useful to you. It can be used for daily reminders, like the one that will remind you to take a medication or to drink water, or it can be used for daily tasks, like making the bed, cleaning the house, etc. You can also use this tool for personal reasons, like if you need to remember to pay a bill, book an appointment, etc.