Due to a significant increase in users and trading activity, Binance will need to extend the System upgrade and is expected to be completed by 2PM (UTC).
Withdrawals and trading during this period will remain suspended.
Binance is one of the largest exchanges in the world,According to CoinMarketCap, it has over $2 billion in 24-hour trade volume and 190 currencies and tokens. The outage may worry those who suffered in the recent exchange hack in Japan but the Binance team have assured that it is all under control.
https://support.binance.com/hc/en-us/articles/360000713851