Historically, Zulip blog posts have actually gotten more engagement when they landed on the Hacker News homepage during off-peak times for regular news (After business hours and weekends) than when we've published them on weekdays mornings.

Fun fact: The original blog post announcing the Zulip Open Source project (https://news.ycombinator.com/item?id=10279961) was published on a Friday and I think got more attention because of that choice of date than it would have otherwise.