Yearly Calendar

A yearly Calendar has 12 months, 52 weeks & 365 days, it's a system of timekeeping that defines the beginning & length & divisions of a year. Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser. On December 7, 2004, version 1.0 was released, and received over 500,000 downloads in its first three days of release, and 1,000,000 in 10 days.