Getting taskbar with clock (notification area) on second monitor with Windows 10

Solution 1:

You can right click either taskbar, uncheck Lock all taskbars, and then drag the taskbar that includes the Notification Center onto the monitor you want it. Afterwards you can recheck the Lock all taskbars option if you wish.

I've confirmed that this currently works, but have not seen a way to add the notification center to muliple taskbars.

Solution 2:

Set your monitor as main monitor in Display properties, unlock the taskbar, right click on the taskbar and select properties, you should have a section there that lets you show it on multiple monitors, also lets you select what buttons appear in the other taskbars, accept your changes, then drag the main taskbar to the monitor that you want to show the clock on, then relock it.