TS2D is the command that translates a Timestamp to Date
$ go install github.com/s-ichikawa/ts2d@latest
$ echo 1660358443.2188597 | ts2d
"2022-08-13 11:40:43.002188597 +0900 JST"
$ echo 1660358443.2188597 | ts2d -gf "2006-01-02T15:04:05-07:00"
"2022-08-13T11:40:43+09:00"
$ echo 1660358443.2188597 | ./ts2d -f "yyyy/MM/dd 'at' hh:mm:ss a z"
"2022/08/13 at 11:40:43 AM JST"
example of kubectl logs
$ kubectl logs -f hello-server-1234567890-abcdef
{"level":"info","ts":1660358286.850947,"msg":"hello"}
{"level":"info","ts":1660358286.8685086,"msg":"hello"}
...
$ kubectl logs -f hello-server-1234567890-abcdef | ts2d
{"level":"info","ts":"2022-08-13 11:38:06.000850947 +0900 JST","msg":"hello"}
{"level":"info","ts":"2022-08-13 11:38:06.008685086 +0900 JST","msg":"hello"}
...