Planning my schedule and highlighting important deadlines using a software proved to be less effective for me compared to using pen and paper. I started a short time ago to print a month calendar which is very handy for this task.
If you want to print your own calendar in a nice format as a postscript file, you can try the following on your terminal with pcal:
brew install pcal ## Or "sudo apt-get install pcal" on Ubuntu/Debian pcal -w -P a4 -F 1 -t Garamond -d Garamond > calendar.ps ps2pdf calendar.ps ## To convert it into PDF format if you need
Now you have a nicely formatted yearly calendar.