Double-Check the Accuracy of Your Clock at Time.isS

Webapp compares your computer's clock to an atomic clock (the "most accurate time source in the world") to let you know how accurate your clock is.

It's safe to assume you've changed all your clocks by now for Daylight saving time, so we're not going to patronize you by "reminding" you to change them. But your computer's clock can drift over time, depending on your settings, so while a few seconds here and there isn't going to make a huge difference, it doesn't hurt to double-check that you're in sync with reality. To do so, just hit up and it'll let you know how closely your computer's clock matches up with their atomic-clock-syncing timekeeper.

If you happen to learn that you clock's accuracy could use some improvement, consider syncing your Windows clock with an alternative time server and increase it's sync frequency.