Quick, clean, and to the point

Insert current time

Windows shortcut 
Mac shortcut 

This shortcut will insert the current time as a fixed value; it will not change.

Note: In Mac 2016, Control Shift : stopped working to insert a time. Command ; now seems to work.

Related videos

The videos below demonstrate this shortcut.
In this lesson, we cover shortcuts you can use to to enter data in one or more cells at a time. Knowing these tips can really speed up editing in Excel.
You may often want to enter the current date and time into a worksheet. In this video, we look at several ways to handle current dates and times.
In this video, we show useful shortcuts for entering the current date and time.