According to previous reports, Ethereum officially announced that the “Muir Glacier” hard fork is planned to be carried out at a block height of 9,200,000 (expected on January 1, 2020) to delay the difficulty bomb. The specific date may be due to the time period. And time zone. Blockstream CSO Samson Mow pointed out that the date of the hard fork was not chosen properly; most exchanges, infrastructure providers and mining pools are not ready for this upgrade. The Bitcoinist article states that January 1 was relatively inactive for the crypto market.