That is the expected date, not the announced date. So, it is not very official. However, it's a good date for me. All my short puts will expire, worthless before the announcement is made. In other words, more free money. Surely, everyone expects a good report.
Where do you see that. I am registered with VocalTec corporate site and receive emails whenever there is a company announcement and so far I have not received one. I still think any announcement will be after March 19th.