The routine AdWords system maintenance originally scheduled for October 13th, has been rescheduled to occur this coming Saturday, October 20th. The AdWords system will be unavailable from approximately 10 a.m. to 2 p.m. PDT on that day. While you won't be able to sign in to your accounts during this time, your campaigns will continue to run as usual.
AdWords system maintenance typically occurs on the second Saturday of each month during the times mentioned above -- with an occasional exception as noted here. We'll continue to update you via the blog as we always have, but you may want to take note of our intended dates and times to help you plan for any scheduled downtimes further down the road.
Update: Fixed typo