12 January 2018 Achain (ACT) ACT Fork
"ABitcoin was forked at the height of 498888 at BTC on Dec. 12 and will initiate forking at 1498888 at ACT on Jan. 12, 2018"
Source
https://cointelegraph.com/news/after-blockshow-how-achains-fork-theory-has-worked-in-real-life
Thanks for sharing this information! Was looking for the block height to avoid the ensuing dump...