GoogleCL is great as it gives you command line access to a number of Google's services. The best thing is that it's supported by Google themselves and I therefore believe it'll be the best CLI tool to use with the Google services once the project matures.
Calendar events are always added to the following day
I had the problem that
$ google calendar add "Dinner at Tiffany's"
always would add the event on the next day, not today's date. I just had a hunch it was related to timezone (although that normally doesn't imply date + 24 hours, more +/- a few hours). Anyway, putting
$HOME/.bashrc remedied it. Now all my
events are added to the correct day and time.