It’s my natural instinct as an artist to hoard *um, I mean be SUPER resourceful about* materials that inspire me to make them over & use them again. Here’s a fun project that I came up with last year as a way to use our 2010 calendar (I couldn’t bear to recycle all of those cute Boston Terrier PUPPIES!). We are always in need of envelopes for our dog walker’s bi-weekly payment, etc. & we like to keep corresponding fun. These also make a cute gift paired with some pretty colored blank cards & tied up with some baker’s twine.
Materials
1 old calendar (the more interesting, the better!)
1 envelope (small-medium)
pair of scissors
ball point pen or pencil (for tracing template)
straight edge (I prefer a cork backed metal ruler)
bone folder or popsicle stick
magazine or self healing cutting mat (to protect your work surface)
glue stick
Steps
1.Disassemble the calendar & cut the calendar pages in half. Set the cover of the calendar aside.
2. Carefully slide your finger under the glued edges of the envelope & pull it apart, smoothing it flat. (If you’re worried about ripping it, steam it open over a kettle or pot of boiling water. The envelope I used — a stray that I found in the bottom of our filing cabinet — came apart just fine without any extra effort.)
3. Take the cover of the calendar (or any other sturdy piece of cardboard or card stock you have lying around), trace the envelope onto it using the ball point pen/pencil & cut it out. This is your “template”!
4. Trace your template onto the calendar pages. I traced the side of the calendar page with the image on it because I wanted to be very intentional about how the image would appear on the finished envelope but you could trace the template on the other side if you’re worried about the pen marks showing up on the finished envelope. Speaking of…I used a Sharpie so it would show up in pictures for this tutorial but I’d recommend using something with a finer tip.
5. Cut out your calendar page envelopes.
6. Using your bone folder (or tip of a popsicle stick) & straight edge, create a crease along each side of the envelope. (Just match up the corners with your straight edge & slide the bone folder along the edge — using the point to create a little invisible line in the paper.)
7. Fold each flap of each envelope on the creases.
8. Place a folded envelope on top of a piece of scrap paper & glue the sides of the bottom flap. Fold it in and smooth it down (make sure the bottom corners are really glued down!). Repeat for the remaining envelopes.
Maker’s note: As I use each envelope, I seal the top flap with a little piece of tape, a swipe of a glue stick or a decorative label/sticker.
If your calendar images are really bold/dark, you might also want to stick a label on the front of the envelope for the address.
sippetsandsharpies 
what a great idea and your instructions were spot on. i have all those tools you need so am going to try this one soon!
oh yay! share pictures when you do!