In honor of Fashion Week, this Saturday, AdSense will be workin' it out. No, not on the runway — w e'll be doing regular system maintenance from 10am-2pm PST. Even AdSense needs its beauty rest! ;)

You won't be able to access your account during this time, but don't worry, dahling - we'll keep serving those fabulous ads and recording all those stunning impressions they make on your visitors.

said Julie Beckmann - AdSense Publisher Support
Note: The emphasis is mine.

AdSense publisher demographic is diverse and international. With such diverse audience I think it is better to use more professional language.