Today is Qixi(七夕）festival in Taiwan. The festival takes place on the 7th day of the 7th month in the lunar calendar, celebrating the annual meeting of the cowherd and weaver girl in mythology. It's also known as "star festival" since the cowherd and weave girl; a couple who live apart from each other have a gathering on the milky way.
In Japan, we also celebrate Qixi as the "Tanabata Festival", but the way to celebrate it is a bit different. Commonly Tanabata is being observed on the 7th of July in the Gregorian calendar, and since it's usually in the midst of the rainy season, there's a small chance of seeing the stars. Tanabata is also a day to make a wish. We write a wish on a piece of card called tanzaku(短冊), and hang it on a bamboo tree.
In Taiwan, Qixi is known as Valentine's Day because of the romantic mythology. Before traveling to Taiwan, I only knew Valentine's Day as a Western holiday, so it seems an interesting discovery that Valentine's Day is in the East.