August 29th was the traditional Tanabata. This is because it falls on the seventh day of the seventh month in the traditional East Asian lunisolar calendar. So special events were scheduled. For example, special planetarium show was held in Nagoya City Science Museum, and special star party was held in Saga City Hoshizora Gakushukan.
Since this year's Lunar New Year was on January 29th, August 29th actually corresponds to the seventh day of the eighth month. However, due to the insertion of a leap month, the sixth month occurred twice, making this month "the seventh month". Consequently, the date of traditional Tanabata in Gregorian Calendar was later than usual.
On the evening of traditional Tanabata, there is always the Moon whose age is around 6 in the sky.
Traditional Tanabata also be celebrated in China as Qixi Festival and in Korea as Chilseok. They are based on the love story of a cowherd (Altair) and a weaver girl (Vega), so so we celebrate the pair of Vega and Altair. I attach a photo of the Summer Triangle, which includes Vega and Altair, taken with my smartphone in the urban area.