How to find top 100 richest bitcoin wallet addresses on given date? There is a list of top richest bitcoin wallets at this moment.

How can I find the list of top richest wallets on other dates in the past?
You can use blockchair.com. It allows to easily search and analyse the Bitcoin blockchain (also Bitcoin Cash and Ethereum). 

In your case, you can sort the transaction outputs (addresses) descending 
 by value and optionally specify the time in the time field so you get the top richest addresses at that time.