How do I use blockchair.com or any other bitcoin explorer or tool to get an address balance on a certain date time?
Say, I want to know balance of 1BitcoinEaterAddressDontSendf59kuE on 29/02/2016 19:20:21 GMT. How do I proceed?
Just enter that address on the main search bar, then click on Wallet Statement (it's just below the address). It'll show you a tx history, just enter your own date range.
So for your address:
https://blockchair.com/bitcoin/address/1BitcoinEaterAddressDontSendf59kuE/statement