The Shonan Hiratsuka Tanabata Festival began in the post-war years and is known for the colourful decorations that are hung along the streets. The festival generally starts around 10am and ends at 8pm each day. See the official website for a full event schedule (Japanese only), but the parade is from 10:30am on the Friday and Saturday. The main events take place in and around the commercial district (shotengai) outside the North Exit of Hiratsuka Station.
Event details are taken from official sources whenever possible. It is always prudent to check the official event website before attending to make sure that there have not been any changes. If you know of an error in the calendar, then please let me know through the contact form.