This is very handy, from Google Calendar’s Help section:

Google Calendar’s SMS-notification option allows you to conveniently check your calendar just by sending a quick text message.

In order to use this service, you’ll first need to register your cell phone number in your Google Calendar account. You can do this under “Settings” > “Notifications.”

Then, to receive calendar information, just send a text message containing one of the following commands to the shortcode “GVENT”:

* Send “next” to get a notification regarding your next scheduled event.
* Send “day” to get a notification containing all of your scheduled events for the present day.
* Send “nday” to get a notification containing all of your events for the following day.

Definitely makes the Google calendar function a lot more useful.

(Via)