Did you know that odd days are calculated differently in UK and USA. In the United Kingdom (and the British Commonwealth), the date format is usually ‘Day/Month/Year’ (either 2 or 4 digit year).

Prepare to be challenged by your mathematical skills today as you may be asked by friends and teachers about your knowledge of odd day. Indeed, today, 5/7/09 is the Odd Day, which happens only six times per one hundred years.

Most people have probably not even heard about it, but today is Square Root Day. It's a very rare calendar event that happens several times in a thousand years.

According to Researchers at Core Security Technologies, they have uncovered three vulnerabilities in Apple's iCal application that hackers can exploit to take over vulnerable machines or launch denial-of-service attacks.

Later this year Comcast will open new web based service called SmartZone that will integrate voicemail, email, address book and calendar all in one.