Please RSVP by July 1, 2026.
Yes, please dress in "summer formal" attire. Websites with some examples. https://jesskeys.com/what-to-wear-to-a-summer-wedding-2/ https://www.theknot.com/content/mens-wedding-guest-attire-summer
When you get to the RSVP page and find your name: if there is a "guest" underneath your name, please feel free to bring a date!