Block 481,824.
That's when Segregated Witness (SegWit) will activate on bitcoin late today or tomorrow morning, bringing the years-long debate over the contentious code upgrade to an official close. At that time, users will finally be able to take advantage of the long-promised technology.
Looking back, it's important to note how long the change – perhaps the biggest ever made to the bitcoin software – has taken. To start, the community has been embroiled in politics since SegWit was first proposed in 2015 by Bitcoin Core contributor Pieter Wuille as a possible "compromise" to the scaling debate.
Article on Coindesk
