Spring, Summer, Autumn, Winter. The four seasons of the year can be a great time to throw a wedding because it gives you a lot of room for experimenting and throwing a wedding in accordance with the theme.
Having a theme wedding is much easier to plan and get things organized because you already know what you are doing and what will be available to you during that time to help you pull off the theme.
Planning a theme wedding requires that you look into a few areas - the color schemes, flower choices, wedding décor, fashion, stationery, menu and wedding favors among other things.
For example, if you were thinking of winter wedding themes or fall wedding themes, you wouldn't be able to use the same flowers, the same décor or fashion, or the same color schemes because they are two very different themes. The thing about seasonal wedding themes is that no two are every alike and it is unlikely you will be able to use the same material for any two themes.