The beauty to printable blank calendars is that you can add ANY details you want, any time you want.
With an infinite amount of blank calendars available for downloading online, perhaps your only question should be "do you want holidays with that?"
Wait, I'll explain in a second!
You see, as great as these nifty little calendars are, sometimes you need a printable calendar with holidays pre-filled in.
This keeps things more organized without you having to remember stuff like daylight savings, approaching holidays or birthdays and Christmas!
Having said that, most of these blank calendars already have the important events and holidays noted. (Apart from some holidays you'll need to fill in yourself).

Far Side Gallery calendar
Here's some other things to keep in mind with your blank calendars that you can use to steal back more of your time and become more productive and efficient!
Get more out of 15 minutes.
Think about your day. Think you can find 15 minutes that you could use more efficiently? Are you losing time with some activities? Or maybe there's an activity you don't need to do?
Just think - if you save a mere 15 minutes every day, you'd save and get back 91 hours every year!
Compete with yourself!
As crazy as it sounds, this works wonders! Set your clock to finish an activity by a certain hour. Using a stopwatch works well for this too.
Remove anything that could distract you (such as Skype, online chat, checking emails etc). Focus on the job at hand and watch as you work way more efficiently!
Complete a list of little activities that take you LESS than a couple of minutes.
Normally you want to do the big jobs first. But the small stuff doesn't go away unless you do it too!

Plan (overseas) traveling time!
Making a list of simple activities will help you finalize things and crank your productivity up a notch.
So set aside some time to complete a list of the small and irrelevant things you don't want to do but have to do, in one sitting.
Work on a certain project over a period of time.
Rather than to try and finalize an activity at one sitting, sometimes it's better to tell yourself: "I'll work on this for 15 minutes and see how much I can get done during this interval."
Focus right on your project and try to do ALL you possibly can during those 15 minutes. This advice might even help you solve those problems or projects you avoid!
Of course, printable blank calendars can help you plan out your projects too.
Look for calendars that come with basic holidays included in the printing, like New Year's Day, Christmas day, Independence Day and so on.
What the printable calendars look like (note the two different sizes, US standard and A4 European):

Printable blank calendar 2011

A 'close-up' view of the 2011 calendar
Download your printable calendars below

Download the printable calendar 2011 here (US)
Download the printable calendar 2011 here (A4)
This is a full 12 month 2011 calendar. The PDF file comes with every month of the year enclosed.
√ Download the PDF to your hard drive
√ Open in (your software) and print the page/s you need
√ Add your own essential details to the calendars
√ Plan out your year instantly!