YouTube - If you navigate away from a video, then immediately return, the player continues where it was left off.
Harvest - When asking for support, the current time at their offices is shown beside their opening hours.
/via Nicolas Bouliane
Mac OSX - The world map displayed within the Data & Time system preference panel changes with the seasons.
/via John Blackburn
Google Analytics - To select a period of time, you can select a complete month by clicking the month title
Gmail - When attempting to sign in with an incorrect password, it reminds you how long ago it was changed.
/via Garrett Miller
Chrome - After clicking on an active download, the status changes to “Opening in [time remaining]”.
/via John MacAdam
Gedit - When trying to close an unsaved document in Gedit a dialog tells you how much work will be lost based on the time since the document was saved.