How to change csv files encoding from [ANSI] to [UTF-8] by batch

There is file list as below,

"2022-01-07.csv" 
"2022-01-11.csv"
 "2022-01-14.csv"
 "2022-01-21.csv" 
"2022-02-08.csv" 
"2022-02-17.csv" 
"2022-02-21.csv"

They are stored in encoding 'ANSI', how can i change them to 'UTF-8' by batch? Thanks!