Tinycal is not a scheduling app. It's a way to see long stretches of time at a glance.
With it you can easily track daily habits, such as for exercise or the Seinfeld Strategy. If you have to schedule vacation time months in advance, Tinycal helps you see which weeks and weekends are free of other obligations. Gardeners can plan a year of planting and harvesting different crops, or mark when they expect flowers to bloom. You can make your own home/away game calendar for your favorite sports team. Or just use it to track the passage of time, marking off each day as it happens to see the year go by.
It's tiny to let you see as much time as possible at once, so one calendar won't fit everything. If you need to track more than fits on one calendar, create multiple calendars.