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Based on the provided knowledge sources, there is no explicit mention that the Mixpanel JavaScript (web) SDK accepts a $time parameter when sending events. The documentation for sending events with the JavaScript SDK shows usage like: LBKSmixpanel.track("Played song", { "genre": "hip-hop" });LBKSIt does not mention the ability to set a $time property directly in the event payload via the SDK. However, it does note that the /track API endpoint (which the SDK uses) will only validate events with timestamps within the last 5 days, and refers to best practices for historical imports, but does not provide an example of setting $time via the SDK itself. Therefore, based on the available documentation, it is unclear or not documented that the Mixpanel web SDK accepts a $time parameter directly in the event properties when tracking events. For sending events with custom timestamps (e.g., for historical data), the documentation recommends using the /import API instead of the standard SDK methods Mixpanel SDKs: Javascript.
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