Grouping date and time

if you just want to select the dates in your table (May skip Weekends, holidays ect)

Add Conditional Column to table in Power Query:
= Table.AddColumn(#"Renamed Columns", "Adj Date", each if [Time] >= #time(11, 0, 0) then [Date] else (Date.AddDays([Date],-1)))

Create a Copy of your Table in Power Query name it Batch
Remove all Columns except for Adj Date
Remove duplicates
add index starting at 1 this will be your batch number

Join to your financials table: [Adj Date] --> Batch Table: [Adj Date]

change index field to not summarize