Fixed date call for papers

README.md

@@ -527,7 +527,7 @@ All the data (past and coming) are available publicly in JSON:
 * 16: [Conf42.com Kube Native 2025](https://www.conf42.com/kubenative2025) - Online <a href="https://www.papercall.io/conf42-kube-native-2025"><img alt="CFP Conf42.com Kube Native 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2015-September-2025&color=green"></a>
 * 16-17: [DevFest Nantes](https://devfest.gdgnantes.com/) - Nantes (France)
 * 20: [TDC](https://2025.trondheimdc.no/) - Trondheim (Norway) <a href="https://sessionize.com/tdc2025/"><img alt="CFP TDC 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2030-March-2025&color=green"></a>
-* 20-24: [NDC Porto 2025](https://ndcporto.com/) - Porto (Portugal) <a href="https://ndcporto.com/call-for-papers"><img alt="CFP NDC Porto 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%1801-May-2025&color=green"></a>
+* 20-24: [NDC Porto 2025](https://ndcporto.com/) - Porto (Portugal) <a href="https://ndcporto.com/call-for-papers"><img alt="CFP NDC Porto 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2018-May-2025&color=green"></a>
 * 22-23: [PyTorch Conference 2025](https://events.linuxfoundation.org/pytorch-conference-2025/) - San Francisco, CA (USA)
 * 22-24: [TestCon Europe](https://testcon.lt/) -  Vilnius (Lithuania) <a href="https://airtable.com/appLMKzG4KLtRRZKA/shruR2a0n1n9y3PfA"><img alt="CFP TestCon Europe 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2001-October-2025&color=green"></a>
 * 24: [DevFest Croatia 2025](https://gdg.community.dev/events/details/google-gdg-zagreb-presents-devfest-2025/) - Zagreb (Croatia) <a href="https://docs.google.com/forms/d/e/1FAIpQLScrrAm6aIN9C2WPPI3Ir1xQmtXz67SOE-qhE97YarNaPFiq9w/viewform"><img alt="CFP DevFest Croatia 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2024-August-2025&color=green"></a>