The letter Y in our festive A-Zdvent calendar is represented by Hans J Wegner's CH24 chair, which is also known as the Y Chair because of its characteristically shaped back. More about Dezeen's A-Zdvent calendar: "Y Chair" by Hans J Wegner
These four "finger-like" extensions to a Vienna restaurant, by PPAG Architects, feature mirrored walls that reflect the surrounding parkland, and windows that slide up above the roof (+ slideshow). More about PPAG Architects adds mirrored extension to restaurant in Vienna's Stadtpark
The criss-crossing metal frame that gives this 1968 design the name X-Chair has helped it find its way into our A-Zdvent overview of classic chairs. More about Dezeen's A-Zdvent calendar: FK 82 X-Chair by Preben Fabricius and Jørgen Kastholm
It's rare to find new houses in Japan that haven't been designed by Japanese architects – but this Tokyo residence with a textured glass facade is the work of Dutch architect Wiel Arets (+ slideshow). More about Glass-coated Tokyo house by Wiel Arets looks like it's been shrink wrapped
Architecture studio Brut Deluxe has designed this year's Christmas lights in Madrid to work like a "flip book on an urban scale", taking spectators on a trip to the moon as they walk through the city (+ movie). More about Madrid installs moon-themed Christmas lights
Comments update: with Christmas just a couple of days away, readers have been scouring the pages of Dezeen for gift ideas – including this all-white Lego kit for architects that was released in Europe this year. More about "Lego for architects? Yes please Santa"
Dezeen promotion: cotton was the material of choice for design studio Barkow Leibinger when forming an undulating canopy in the centre of Marrakech (+ interview + slideshow). More about Barkow Leibinger chose "strong and elastic" cotton for tensile installation in Marrakech
Interview: as Nike prepares to reissue Marc Newson's Zvezdochka footwear, the sportswear brand's president and CEO spoke to Dezeen about how the shoes "helped pave the way for other breakthroughs" in manufacturing, aesthetics and sustainability. More about Marc Newson helped trigger a "manufacturing revolution" at Nike, says CEO Mark Parker
News: Google has updated its prototype self-driving vehicle to make it road worthy, adding headlights and manual steering and braking to comply with road rules in California. More about Google's driverless car is now "fully functional"
This wooden summer house raised off the forest floor on three concrete beams was designed by architect Johan Sundberg for a patch of woodland by the Swedish coastline (+ slideshow). More about Timber summer house by Johan Sundberg expresses "Scandinavian architectural DNA"
News: sportswear brand Nike is reissuing its iconic Zvezdochka trainers designed by Marc Newson, ten years after the shoes were first launched (+ interview + slideshow). More about Nike reissues "revolutionary" Marc Newson trainers
Movie: architect Rossana Hu explains why she and her partner Lyndon Neri turned the theme of "feeling good in architecture" on its head in their keynote speech at this year's Inside Festival. More about Neri&Hu's architecture "challenges the accepted values of society"
News: Japanese designer Tokujin Yoshioka has created a see-through case for the latest Firefox smartphone from telecommunications company KDDI. More about Tokujin Yoshioka designs transparent smartphone for KDDI
CES 2015: Swedish car brand Volvo is launching a prototype cycling helmet that offers two-way communication between the wearer and nearby drivers to help prevent accidents (+ movie). More about Volvo's connected helmet warns cyclists of car collisions
With just two days until Christmas, today's offering from our A-Zdvent calendar is the cardboard Wiggle Chair by architect Frank Gehry. More about Dezeen's A-Zdvent calendar: Wiggle Chair by Frank Gehry
News: Sou Fujimoto is one of three architects that have been selected to design buildings for a Hungarian museum complex in Budapest's City Park (+ slideshow). More about Sou Fujimoto to create House of Hungarian Music at new Budapest museum park
Design Miami 2014: New York artist and designer Sebastian Errazuriz has added a slatted cabinet that opens in waves to his range of unfurlable furniture. More about Wave Cabinet by Sebastian Errazuriz opens "like a paper fan"
Opinion: the now-defunct architecture firm FAT proposed a green bridge for London's River Thames in the 1990s as a form of social criticism. Now life is imitating art with Thomas Heatherwick's Garden Bridge, FAT co-founder Sam Jacob feels an apology is necessary. More about "The Garden Bridge is a magic bullet for a certain idea of the contemporary British city"
Not a fan of cold turkey? London product design firm Seymourpowell has developed a conceptual app to "design out Christmas food waste" for a future free from excessive leftovers. More about Seymourpowell's Waste-Free Christmas Dinner Maker is an app to tackle festive food waste
News: three international design teams, including architects Snøhetta and Allied Works, have developed designs for Hawaii's bid to host Barack Obama's presidential library. More about Hawaii unveils designs for Obama Presidential Centre bid