Pocket-sized "Thumb Calendar" Perfect for Moleskines

For those of you using your Moleskine, Hipster PDA, or other notebook for any sort of productivity use, or for those who just want to have a calendar with them, check out the Thumb Calendar created by Adam Sporka.

The concept is simple: by overlapping the months, Adam has been able to display six months worth of calendar dates on a piece of paper no larger than a business card.  The .pdf template comes ready to cut out and fold so you have a 2-sided card that can slide into your wallet, or you can cut the two halves apart and paste each of them into your Moleskine for a full year calendar on a single reference page.  Each half fits inside the width of a small Moleskine notebook with a small margin on each side:

For those wondering how to read this calendar:
1. Pick 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.

The header of each month is appropriately aligned to show the actual days of the week, and there are versions of the calendar that go Sunday to Saturday and Monday to Sunday.

Thanks to Joe for bringing this to my attention.  This also seems to have been featured on Lifehacker last year, but I must have missed it the first time around.