how to change time in summary index i want _time not which is having in data i have used eval _time (now ) but it is not working its same showing event date not _ time

[abhishekdubey00]

Now
6/1/19
12:31:03.763 AM
2019-06-01 00:31:03.763,

wanted
6/1/19
12:31:03.763 AM
2019-06-01 00:31:03.763

[abhishekdubey00]

wanted
6/6/19
8:17:50.000 AM

2019-06-01 00:31:03.763

now
6/1/19
12:31:03.763 AM
2019-06-01 00:31:03.763