https://docs.google.com/spreadsheets/d/1cipV6Lq-fKll3UmQB5J3CMQKpMIo_Qj1EVVp0eEZR4QGo to File, and Download as .xlsx.
Keep in mind, this is a work in progress, so some stuff may not work correctly. I haven't tested it with more than what's in there right now.
To use it, go to the Entry sheet and enter your info. On the Calendar sheet, you can select the month and year.
The kegs used part is something I put in recently just playing around with it. It shows how many kegs are in use just for stuff that's on the calendar. Once the last date is past, a beer falls off the calendar and is removed from the kegs used tally.
I'm open to any and all comments and/or suggestions for improvements. If you have questions, let me know.