The February 22 announcement shows that both hard forks will happen at ETH block number 7,280,000 with developers anticipating that mining of the block will be at the end of this month. However, allowing for unforeseen mining situations, the set block could be attained two days before or after the set date.
Read the details in the article of Coinidol dot com, the world blockchain news outlet: https://coinidol.com/ethereum-hard-forks/
