Here is the symbolism as explained by Wikipedia:
The word swastika is derived from the Sanskrit word svastik (in Devanagari, स्वस्तिक), meaning any lucky or auspicious object, and in particular a mark made on persons and things to denote good luck. One interpretation of the swastika is derived from the ancient mythological symbolism of Shakti (Devanagari: शक्ति, Shakti) (represented by the vertical line) dancing upon Shiva (Devanagari: शिव, Shiv) (represented by the horizontal line).
Philosophically this may be understood as the two aspects of Brahma (Devanagari: ब्रह्म, Brahma): consciousness and energy interacting to give expression to the universe. The circular movement of this cross may be interpreted as the circular movement of the rising kundalini (Devanagari: कुण्डलिनी).
It is also seen as pointing in all four directions (north, east, south and west) and thus signifies stability and groundedness. The Swastika is a pure geometrical mark and has no syllabic tone associated with it. The Swastika is one of the 108 symbols of Hindu deity Vishnu and represents the sun’s rays, upon which life depends.
On this auspicious occassion of Diwali, I wish all the readers a happy and prosperous new year. I sounds like a cliche’ when it isnt so. Feel the symbolism giving you strength and see you through times, thick and thin. All the very best for your life ahead.