How to change existing date to current date in a filename?

[shankar455]

Suppose i have a list of files in a directory as mentioned below
1. Shankar_04152019_ny.txt
2. Gopi_shan_03122019_mi.txt
3. Siva_mourya_02242019_nd.txt
..
.
.
.
.
1000 . Jiva_surya_02282019_nd.txt

query : At one shot i want to modify the above all filenames present in one path with current date as mentioned like below
Since todays date is :04172019
1. Shankar_04172019_ny.txt
2. Gopi_shan_04172019_mi.txt
3. Siva_mourya_04172019_nd.txt.....etc

Kindly suggest me script .