is there a Mixpanel property that stores when a user signed up?

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Mixpanel does not automatically create a built-in property that stores the exact time when a user signed up. However, it is a common best practice to track a custom property such as signup_date or similar when a user completes the sign-up process. This property should be set by your implementation—typically as a user property on the profile—at the moment of sign-up. You can then use this property for analysis, such as filtering or cohorting users by their sign-up date.For example, in JQL queries, you might see references to a signup_date property, but this is only available if you have explicitly set it in your tracking code or user profile updates: LBKSfunction main() { // get all users who signed up in 2016 return People( ).filter(function(user){ return user.properties.signup_date > = new Date("2016-01-01") &amp;&amp; user.properties.signup_date < new Date("2017-01-01"); }); }LBKSThis example assumes you are setting signup_date as a user property at sign-up time. If you want to analyze sign-up events, you should also track a "Sign Up" event and include relevant properties such as the timestamp and any other context you need <https://docs.mixpanel.com/docs/data-structure/events-and-properties|Events and Properties>.In summary: Mixpanel does not provide a default "sign up date" property, but you can and should set one yourself as part of your implementation if you need to track when users signed up Tracking Plan Methodology.

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