[obelisk_]

Yes, they included that in their post below the picture.

    > NSDate dateWithTimeIntervalSince1970:23510262*60
    2014-09-13 13:42:00 +0000

Btw, are they using an Objective C repl?

[jakobegger]

That might be fscript?

http://www.fscript.org

[mjmsmith]

Yes, it's F-Script. Playgrounds pre-Swift :)