Happy Gudi Padava

To uninitiated Gudi Padava is beginning of new year to Maharashtrians. It has similar relevance to Kannada and Telugu people also. It is known as Ugadi to those peoples.
Sindhi's also celebrate Cheti Chand on this day. It's the 1st day of new year that is Shuddha Pratipada(First day) of Chaitra Month according to Hindu calendar.

If you look at antiquity for this day, according to the Brahma Purana, on this day Brahma created the world after the deluge and time began to tick from this day forth. This is one of the 3 and a half days in the Indian Lunar calendar, whose every moment is considered auspicious.