# Feature Flag and Experiment targeting based on First Seen Timestamp — Amplitude Changelog

Source: https://amplitude.com/en-us/releases/feature-flag-and-experiment-targeting-based-on-first-seen-timestamp

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[Changelog](/releases)/Feature Flag and Experiment targeting based on First Seen Timestamp

ActivationApr 16, 2026

# Feature Flag and Experiment targeting based on First Seen Timestamp

## What it is

**What it is:** Remote evaluation for flags and experiments now includes a built-in "First Seen" user property, pulled from the amp ID table at evaluation time. Flags and experiments can target on this value directly, bypassing the cohort membership update cycle that makes new-user targeting unreliable. The property mirrors what's already available in local evaluation via Web Experiment.

**Where:** Feature Flags and Experiments

**Who:** All customers, including EUDC

**When:** GA. Available now.

Release details

- Release ID

  feature-flag-and-experiment-targeting-based-on-first-seen-timestamp

- Shipped

  Apr 16, 2026

- Area

  Activation

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