The next halving will happen at block: 840,000
This means that 893 blocks are left and it will approximately happen in..
5 days or
130 hours or
7,811 minutes!

What is it all about?

Halving is an anti-inflation mechanism implemented, in the Bitcoin network. As the name suggests a reduction in the supply of new coins is cut by half (50%). This causes BTC inflation to fall cyclically. It takes place whenever 210,000 blocks have been mined which is roughly around once every 4 years. Current mining rewards are 6.25 bitcoins.
Bitcoin: A Peer-to-Peer Electronic Cash System