Because the digits are of varying widths in the standard Apple system font, the ticking seconds cause the date strings to jiggle back and forth and the table co

Because the digits are of varying widths in the standard Apple system font, the ticking seconds cause the date strings to jiggle back and forth and the table column widths to jiggle as well! However, you can use CSS to select the fixed-width variant for digits. This is a perfect example of a use case for: * { font-variant-numeric: tabular-nums; }