Adam Sporka has a nifty idea for our notebooks:
How It Works
First half of the year is on one side of the card, the rest of the year is on the other. The field of numbers is shared among the six months on each side. The header of each month is appropriately aligned to show the actual days of the week.
1. Find the month you want to read.
2. Use your thumbs to cover the numbers that are not directly below the month header.
3. Note the color of the month header. The last day of the month is rendered in the same color.
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