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The following are events that are happening just now or that should happen very soon. Get ready for them!

If you know of any upcoming events, conferences, seminars and other opportunities where OpenStreetMap might be promoted, please add them to this calendar. See Template:Calendar for instructions.

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Event Calendar

30th April Social Mapping Event in Parramatta Sydney, New South Wales, Australia 30th April–3rd May FOSSGIS-OSM-Communitytreffen im Linuxhotel Essen, North Rhine-Westphalia, Germany 1st–7th May 大理三月民族节 Dali Town, Dali City, Yunnan, China 1st May MA1PPING Weil der Stadt (Kernstadt), Baden-Württemberg, Germany 2nd May Workshop: JOSM - Java OpenStreetMap Editor - Eine Einführung Augsburg, Bavaria, Germany 2nd May OSM India - Monthly Online Mapathon New Delhi, India 2nd May Mappando si Vinci! - 2 Maggio 2026 Spicchio-Sovigliana, Vinci, Tuscany, Italy 5th May OSM-Treffpunkt Salzburg, Salzburg, Austria 5th May Braunschweiger Mappertreffen im Stratum 0 Hackerspace Brunswick, Lower Saxony, Germany 5th May Missing Maps London Mapathon (with Training) Beginner Friendly (Online) [eng] 6th May iD Community Chat 6th May Stuttgarter OpenStreetMap-Treffen Stuttgart, Baden-Württemberg, Germany 7th May Surveillance mapping with MapRVA Richmond, Virginia, United States 8th May Capacitação OSM 2026 - IVIDES DATA ® - Dia #2 - Editor iD Rio de Janeiro, Rio de Janeiro, Brazil 8th May SOSM Association Annual Meeting Bergdietikon, Aargau, Switzerland 10th May OSMmapperCPH Copenhagen, Capital Region of Denmark, Denmark 10th May OSM Delhi Mapping Party No.29 (South Zone) Delhi, India 11th May Missing Maps : Mapathon en ligne - CartONG [fr] 11th May 187. OSM-Stammtisch Zürich Zurich, Zurich, Switzerland 11th May OpenStreetMap x Wikidata Taipei #88 Chengnei, Taipei, Taiwan 12th May 1. OSM Stammtisch Magdeburg Magdeburg, Saxony-Anhalt, Germany 12th May Hamburger Mappertreffen Hamburg, Germany 12th May OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 13th May Rencontre Mapadour Bayonne, Nouvelle-Aquitaine, France 13th May Pražský mapathon s Lékaři bez hranic v Seznam.cz Prague, Czechia 13th May 2026 Spring End Maptime Amsterdam, North Holland, Netherlands 13th May Münchner OSM-Treffen Munich, Bavaria, Germany 14th May Mapaton - Marsh 16th–17th May Mappiamo le Aci Santa Maria la Scala, Acireale, Sicily, Italy 17th May Mapping at Mylapore Market, Chennai Chennai, Tamil Nadu, India 18th May Unibo Mapathon OpenStreetMap 2026-05 Bologna, Emilia-Romagna, Italy 18th May Rhein-Neckar OpenstreetMap Treffen Mannheim, Baden-Württemberg, Germany 19th May Webinaire de sensibilisation à OpenStreetMap pour les collectivités 19th May Missing Maps London Mid-Month (Without Training) Advanced Mappers [eng] 19th May Réunion du groupe local de Lyon Lyon, Auvergne-Rhône-Alpes, France 19th May 200. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 19th May OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 19th May Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 20th May Stammtisch Karlsruhe Karlsruhe, Baden-Württemberg, Germany 23rd May Raccolta dati aree verdi @ Giornata Mondiale della Biodiversità 2026 - Citizen Science Ferrara Ferrara, Emilia-Romagna, Italy 23rd May OSM Mumbai Mapping Party No.10 (Trans-Harbour Line - North) Navi Mumbai, Maharashtra, India 25th May Missing Maps : Mapathon en ligne - CartONG [fr] 27th May Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 2nd June OSM-Treffpunkt Salzburg, Salzburg, Austria 2nd June Missing Maps London Mapathon (with Training) Beginner Friendly (Online) [eng] 4th June State of the Map Baltics 2026 Riga, Latvia 6th June Braunschweiger Mappertreffen im Stratum 0 Hackerspace Brunswick, Lower Saxony, Germany 7th June OSM India - Monthly Online Mapathon New Delhi, India 8th June Missing Maps : Mapathon en ligne - CartONG [fr] 8th June OpenStreetMap x Wikidata Taipei #89 Chengnei, Taipei, Taiwan 9th June Hamburger Mappertreffen Hamburg, Germany 9th June OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 11th–13th June State of the Map US 2026 Madison, Wisconsin, United States 11th June Münchner OSM-Treffen Munich, Bavaria, Germany 14th June OSMmapperCPH Copenhagen, Capital Region of Denmark, Denmark 14th June OSM Delhi Mapping Party No.30 (West Zone) Delhi, India 16th June Missing Maps London Mid-Month (Without Training) Advanced Mappers (Online) [eng] 16th June Réunion du groupe local de Lyon Lyon, Auvergne-Rhône-Alpes, France 16th June OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 16th June 201. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 16th June Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 17th June 21. Österreichischer OSM-Stammtisch (online) Stainach-Pürgg, Styria, Austria 18th June Essen OSM-Treffen Essen, North Rhine-Westphalia, Germany 19th June Missing Maps Mapathon in Stuttgart Stuttgart, Baden-Württemberg, Germany 20th June OSM Mumbai Mapping Party No.11 (Trans-Harbour Line - South) Maharashtra, India 22nd June Missing Maps : Mapathon en ligne - CartONG [fr] 26th–28th June State of the Map Africa 2025 Dar es-Salaam, Tanzania 26th June Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 29th June Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 7th July OSM-Treffpunkt Salzburg, Salzburg, Austria 7th July Missing Maps London Mapathon (with Training) Beginner Friendly (Online) [eng] 13th July OpenStreetMap x Wikidata Taipei #90 Chengnei, Taipei, Taiwan 14th July Hamburger Mappertreffen Hamburg, Germany 14th July OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 15th July Online Mapathon von ÄRZTE OHNE GRENZEN 21st July Missing Maps London Mid-Month (Without Training) Advanced Mappers (Online) [eng] 21st July 202. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 21st July OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 21st July Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 29th July Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 4th August OSM-Treffpunkt Salzburg, Salzburg, Austria 4th August Missing Maps London Mapathon (with Training) Beginner Friendly (Online) [eng] 10th August OpenStreetMap x Wikidata Taipei #91 Chengnei, Taipei, Taiwan 11th August OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 16th August Kartenwerkstatt Oschatz Oschatz, Saxony, Germany 18th August Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] 18th August 203. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 18th August OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 18th August Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 26th August Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 26th August 79. Wiener OSM-Stammtisch Vienna, Austria 27th August OpenStreetMap West Bengal Mapping Party + AnkushTheHero Day 28th–30th August State of the Map 2026 Champs-sur-Marne, Ile-de-France, France 28th August Essen OSM-Treffen Essen, North Rhine-Westphalia, Germany 31st August Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 1st September OSM-Treffpunkt Salzburg, Salzburg, Austria 1st September Missing Maps London Mapathon Beginner Friendly (with Training) (Online) [eng] 7th September OpenStreetMap x Wikidata Taipei #92 Chengnei, Taipei, Taiwan 8th September OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 15th September Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] 15th September OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 15th September 22. Österreichischer OSM-Stammtisch (online) Stainach-Pürgg, Styria, Austria 15th September 204. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 15th September Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 25th September Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 26th–27th September Karlsruhe Hack Weekend September 2026 Karlsruhe, Baden-Württemberg, Germany 3rd October Essen OSM-Treffen Essen, North Rhine-Westphalia, Germany 5th October OpenStreetMap x Wikidata Taipei #93 Chengnei, Taipei, Taiwan 6th October OSM-Treffpunkt Salzburg, Salzburg, Austria 6th October Missing Maps London Mapathon Beginner Friendly (with Training) (Online) [eng] 13th October OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 20th October Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] 20th October OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 20th October 205. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 20th October Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 26th October Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 27th–29th October State of the Map LATAM 2026 in Mexico City Mexico City, Mexico City, Mexico 27th October 80. Wiener OSM-Stammtisch Vienna, Austria 28th October Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 3rd November Missing Maps London Mapathon Beginner Friendly (with Training) (Online) [eng] 7th November Maker Days Salzburg Salzburg, Salzburg, Austria 9th November OpenStreetMap x Wikidata Taipei #94 Chengnei, Taipei, Taiwan 10th November OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 17th November Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] 17th November OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 17th November 206. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 17th November Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 25th November Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 1st December OSM-Treffpunkt Salzburg, Salzburg, Austria 1st December Missing Maps London Mapathon Beginner Friendly (with Training) (Online) [eng] 7th December OpenStreetMap x Wikidata Taipei #95 Chengnei, Taipei, Taiwan 8th December OSM-Stammtisch Ulm/Neu-Ulm Neu-Ulm, Bavaria, Germany 9th December 23. Österreichischer OSM-Stammtisch (online) Stainach-Pürgg, Styria, Austria 13th December Essen OSM-Treffen Essen, North Rhine-Westphalia, Germany 15th December Missing Maps London Mid-Month for Advanced Mappers (no training provided) (Online) [eng] 15th December OSM-Stammtisch Chemnitz Chemnitz, Saxony, Germany 15th December 207. OSM-Stammtisch Bonn Bonn, North Rhine-Westphalia, Germany 15th December Lüneburger Mappertreffen (online) Lüneburg, Lower Saxony, Germany 18th December Düsseldorfer OpenStreetMap-Treffen (online) Dusseldorf, North Rhine-Westphalia, Germany 25th January Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 29th March Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 31st May Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 26th July Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 27th September Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany 29th November Rhein-Neckar OSM Treffen Heidelberg, Baden-Württemberg, Germany Add your event to OpenStreetMap Calendar

Advice on organizing developer events

Developer events, also known as "hack days", "hack weekends" and "hackathons", are meetings of developers to discuss, network and collaborate with other developers, designers, documenters, and others with an interest in software.

If you are organising one of these events, then you may like to read our Engineering Working Group's advice.

Past events

See the Past Events page.