What time is MKR on?

Could you please tell me, at what precise moment does Maker (MKR) become available for trading? I'm interested in understanding the exact schedule for its listing on the exchange platforms I frequent. Is there a specific time zone that this information is referenced to, or does it vary based on the individual exchange? Also, would it be possible to receive notifications or alerts when MKR becomes tradable, so that I can be sure not to miss out on any potential opportunities? Thank you for your assistance in clarifying this matter.