If you want to keep a record of timed or chronological events in your notes, such as a log of daily phone calls or the completion dates of tasks on your to-do list, you can insert your Mac’s current date and time anywhere in your notes.
Note: Inserting the current date and time is different from the page creation date and time stamp that OneNote automatically adds underneath the page title whenever you add a new page to your notebook.
In your notes, place the cursor where you want to insert the current date and time, and then do either of the following:
To insert the current date, click Insert > Date (or press Command-D).
To insert both the current date and the current time, click Insert > Date Time (or press Shift-Command-D).
Tip: OneNote uses the date and time format specified in your Mac’s regional settings. If you want to change the appearance of these formats, click the Apple menu, and then click System Preferences. Next, double-click Date & Time, and then click Open Language & Region > Advanced > Dates (and/or Times).