When was Zeta Chain launched?

Could you please elaborate on the timeline of the launch of Zeta Chain? I'm particularly interested in knowing the exact date or the approximate period during which it became operational. This information would help me understand the market positioning and the potential impact it may have had on the cryptocurrency and finance industry at the time of its inception. Additionally, it would be insightful to know if there were any significant events or milestones that occurred shortly after the launch that further shaped the development of Zeta Chain.