Debugging 'Timestamp Must Be Within 7 Days' Meta CAPI Error

1. The Milliseconds vs Seconds Trap in JavaScript

JavaScript developers habitually call `Date.now()` to get the current timestamp. In JavaScript, `Date.now()` returns milliseconds (e.g. `1726521600000`—13 digits).

Meta's Graph API strictly expects unix epoch seconds (10 digits: `1726521600`). When you pass a 13-digit millisecond timestamp, Meta interprets the number as a date thousands of years in the future, instantly throwing the error: 'Timestamp must be within 7 days of event occurrence'.

2. Comparative Analysis: Standard Tracking vs CAPI Control

The table below outlines the architectural and financial differences between passive conversion tracking and active signal governance:

3. Universal Unix Epoch Seconds Normalizer

Ensure your code always divides JavaScript timestamps by 1,000 and applies `Math.floor()` to produce an integer:

// Correct Timestamp Generation in Node.js / JavaScript
export function getMetaTimestamp(dateInput = null) {
  const ms = dateInput ? new Date(dateInput).getTime() : Date.now();
  // Divide by 1000 and floor to get pure 10-digit unix epoch seconds
  const seconds = Math.floor(ms / 1000);

  // Failsafe check: Ensure timestamp is not older than 7 days (604,800 seconds)
  const currentSeconds = Math.floor(Date.now() / 1000);
  if (currentSeconds - seconds > 604800) {
    console.warn("Timestamp is older than 7 days: Capping to current time.");
    return currentSeconds;
  }
  return seconds;
}

How to Deploy CAPI Control to Fix This Today

1. Step 1: Audit your codebase for calls to `Date.now()` in CAPI payload formatters.
2. Step 2: Ensure timestamps are divided by 1,000 and passed as integers.
3. Step 3: Verify that your application servers run active NTP time synchronization.
4. Step 4: Deploy CAPI Control to automatically sanitize timestamp formats at the edge.