Date-time format in json?

I got some json by using discourse api. There are some fields about datetime. like this:

"created_at": "2019-07-24T12:25:02.016Z",
"last_posted_at": "2019-07-25T06:21:58.328Z",

what the ‘T’ and ‘Z’ stand for in this format? is there any tool to parse it? I need to do some math manipulation about it.

It’s a standard date time format and pretty much every programming language should have support for parsing it.