BB pal Russell Walks created this wonderful Gallifreyan Perpetual Calendar and Galactic Star Chart for Timelords and their fans. It enables you to "find the day of the week for any date between 1600 and 9999 AD." Large prints are $30.
Electronics are contained in box at back waist containing arduino uno, 2 nine volt batteries, and small amp. Speakers are in ends of tube around neck and mic is on an earpiece. Arduino board powers eye stalk and dome lights as well as handles dalek voice modulation. I found the arduino sketch (source and circuit diagrams) can be found here, kudos to Andy Grove for the sketch. Originally created for my wife (the only dalek I will ever love) for the Time Traveler's Ball held at the Redmoor in Cincinnati 11/17/12Photo Link. (Shared in the BB Flickr Pool)