Chronus is a renamed version of “Lock Clock” from CyanogenMod. The name led people to assume it was limited to the lockscreen, but it also did just fine on your homescreen. The widget displays a clock along with weather and calendar events, all in one place. It is configurable in Settings and the settings apply to all the instances of the widget (both home and lockscreen).
However, it is a very useful widget and a great departure from the stock one. It both adds functionality and looks good. It’ll be included in the latest nightlies for you to try out, but it’ll have a few bugs here and there because it’s so new. Just know that the team is working on it. Tell us what you think of it once you try it!