That's what everyone was saying yesterday as they decorated their houses and set off fireworks. There were parades through different neighborhoods where images of Krishna were carried through the streets. People lined up to worship Krishna. Pujas (worship) were being given in temples and in tents set up for the occasion. It made for some fun sights to see and a lot of new experiences to take place.
Lord Krishna is an incarnation or avatar of Lord Vishnu. Vishnu is part of the Hindu Trinity and is the lord of sustaining life. Most women and young girls love Krishna. He is easily recognized as his skin is blue. There are many stories of his love for the milkmaid Radha. Women long to be loved as Krishna loved Radha. Krishna is known for being mischievous and flirty.
They call this day Krishna Janmashtami.
For more information check out this link:
http://en.wikipedia.org/wiki/Krishna_Janmashtami