Here is a publication which is also posted at the University of Nevada Cooperative Extension website on vegetable gardening in the Moapa Valley. The Moapa Valley is located about 60 miles outside of the Las Vegas Valley, on the eastern edge of the Mojave Desert, with a very similar climate to the Las Vegas Valley. Planting dates will be similar but the soils of the Moapa Valley are typically much better than those in the Las Vegas Valley.
Here is the planting calendar that I pulled out of the publication so that you can use it without having to open the publication.