The event will feature 197,000 LEDs and visitors in a cool blue glow nightly until 11 p.m.

The most dynamic concentration can be found on the 150-meter (492-foot) high observation floor, where river of stars has been added to the ceiling. Careful observers might notice two non-blue points in the mix, though, a red light representing Vega and a white light for Altair, the pair of stars that symbolize the Cowherd and Weaver’s Daughter who meet but once a year in the festival known as Tanabata.

For those looking to enjoy a cool breeze along with the cool color scheme, the 600-step exterior staircase will also be decorated for the Milky Way Illumination.

Of course, nothing says summertime cool in Japan like wearing a yukata, or summer kimono. Visitors to Tokyo Tower between July 5 and 7, 2017 will receive ¥100 off admission (US$0.90) to the observation floor, which is usually priced at ¥900 for adults.

While the discounts are only offered for a very limited time, the Milky Way Illumination will be going on until September 3.

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