You will need:
A particle photon
A small speaker
A piece of cardboard
and a breadboard
Step 1: Frame
Cut a piece of cardboard to the measurements shown above.
Tape it together like shown above.
Step 2: Sync Photon
Follow the guide to sync a particle photon to your account on this website:
Step 3: Wire Up the Electronics
Wire up the electronics as shown above
Step 4: Code
Create a new file in particle Build.
Take the code from this .txt file and put it in your particle build file.
Step 5: Set Up IFTT
Go to IFTT.com and setup an IFTT account.
Then, go to the top right corner and create a new applet.
You want to create an applet that links your calendar to the particle IO.
Step 6: DONE!
Hook up the photon to power, set your google calendar so that your photon will receive the updates, and voila!