Update README.md

added GeeCON 2025

README.md

@@ -437,6 +437,7 @@ All the data (past and coming) are available publicly in JSON:
 * 13-14: [DevOps Days Geneva](https://devopsdays.org/events/2024-geneva/welcome/) - Geneva (Switzerland)
 * 13-15: [iOSKonf25](https://ioskonf.mk/) - Skopje (Macedonia) <a href="https://www.papercall.io/ioskonf25"><img alt="CFP iOSKonf25" src="https://img.shields.io/static/v1?label=CFP&message=until%2031-January-2025&color=green"></a>
 * 14-15: [APIdays New York](https://www.apidays.global/new-york/) - New York, NY (USA) <a href="https://apidays.typeform.com/to/ILJeAaV8"><img alt="CFP API Days New York" src="https://img.shields.io/static/v1?label=CFP&message=until%2014-April-2025&color=green"></a>
+* 14-16: [GeeCON 2025](https://2025.geecon.org) - Kraków, Poland <a href="https://2025.geecon.org/cfp/"><img alt="CFP GeeCON 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2031-January-2025&color=green"></a>
 * 15-16: [phpday 2025](https://2025.phpday.it) - Verona (Italy) <a href="https://sessionize.com/phpday-2025"><img alt="CFP phpday 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2011-January-2025&color=green"></a>
 * 15-16: [ElixirConf EU 2025](https://www.elixirconf.eu/) - Krakow (Poland) <a href="https://sessionize.com/elixirconf-eu-2025"><img alt="CFP ElixirConf EU 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2015-December-2024&color=green"></a>
 * 16: [AFUP Day 2025 Lille](https://event.afup.org/afup-day-2025/) - Lille (France) <a href="https://afup.org/event/afupday2025lille"><img alt="CFP AFUP Day Lille 2025" src="https://img.shields.io/static/v1?label=CFP&message=until%2011-November-2024&color=red"></a>