# Apache Airflow 2.5.2 — Release & Upgrade Intelligence
- **Product:** Apache Airflow (https://airflow.apache.org)
- **Version:** 2.5.2
- **Released:** Mar 15, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/airflow/updates/2.5.2/

## Executive Summary (TL;DR)
Apache Airflow 2.5.2. Source highlight: The date-time fields passed as API parameters or Params should be RFC3339-compliant (#29395)

## New Features
- Add a check for not templateable fields (#29821)
- Add dep context description for better log message (#28875)
- Add Landing Times entry to UI docs (#29511)
- Add trigger process to Airflow Docker docs (#29203)
- Listener plugin example added (#27905)

## Improvements
- Improve health checks in example docker-compose and clarify usage (#29408)
- Several improvements to the Params doc (#29062)

## Bug Fixes
- Fix validation of date-time field in API and Parameter schemas (#29395)
- Fix grid logs for large logs (#29390)
- Fix on_failure_callback when task receives a SIGTERM (#29743)
- Update min version of python-daemon to fix containerd file limits (#29916)
- POST ``/dagRuns`` API should 404 if dag not active (#29860)
- DAG list sorting lost when switching page (#29756)