The Janmashtami is celebrated on the eighth day of the Krishna Paksha (dark fortnight) of the month of Bhadrapada as per Hindu calendar. The birth of lord Krishna was for re-establishment of Dharma.

The Janmashtami is celebrated on the eighth day of the Krishna Paksha (dark fortnight) of the month of Bhadrapada as per Hindu calendar. 
The birth of lord Krishna was for re-establishment of Dharma. 
Significance-
The importance of Janmashtami is to observe the Dharma.When there is Krishna ,there is Dharma and ,where is Dharma there is victory.
The verses in the Bhagavad-Gita say, that whenever there will be predominance of evil and decline of dharma, I will reincarnate to kill the evil and to save the good. The main significance of Janmashtami is to encourage goodwill and to discourage bad will. The holy occasion brings people together, thus it signifies unity and faith.
Happy Janmashtami to all !!