How to create Event content type in Drupal

Let say I'm building a website for a corporate, or an organzition. It should have slideshows, news, pages, Twitter, contact form and so on. Well one more thing, events. Organizations would gladly to have an event feature so they can announce upcoming activities, business owners also want to have their customers well informed of their campaign. So Event is a important piece of a website.

We see there is a high demand for event feature and we have created ST Duduk (highly for event oriented pages such as clubs) and ST Gemshorn. Anw, creating Event content type is not a simple task, so I think it's good to show our step-by-step tutorial for this issue here