Each year, most of us throw out our old calendar and replace it with a new one. Each month, we flip our calendar forward another page, and if we ever need to know which day-of-the-week corresponds to a particular day/month combination, we have to either calculate it ourselves or flip forward/backward to the relevant month.
It turns out that, mathematically, the answer to these questions - or any question where you want to match up the day of the week with the day/month combination in a year - are extremely predictable, straightforward, and simple to figure out.
So long as you know the number of days in each month, it's very easy to use this one-page calendar to match up the day/month of the year with the day of the week that it falls on.
Let's consider American Thanksgiving, which is always celebrated on the fourth Thursday of November. You'll always know that it corresponds to a specific day on the one-page calendar.
Collection
[
|
...
]