Honestly, not sure– I like going out in evenings, but also work well. I think ultimately, you just have to get at working when you can, because as a Founder, sometimes you don't have the luxury of certain decisions.
Adaptability is best, rather than clutching to "Oh I couldn't work yesterday because i only work in evenings, and I had a dinner meeting"
As a cofounder, I've found that my deepest focus work happens during the early mornings. The peace and quiet at that time allow me to dive into tasks with clarity and creativity. However, everyone has their own productivity rhythms, and late nights might work wonders for you. Feel free to connect with me on Product Hunt; I'd love to continue this discussion and be there to support you when you have a launch. Let's stay connected!