Add GraphQL day announcement blog post (#2370)

Ping @jorydotcom 

Closes graphql/community-wg#169

Author: martinbonnin

src/pages/blog/2026-04-07-graphql-day-2026.mdx

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+---
+title: "Announcing GraphQL Days 2026"
+tags: [announcements]
+date: 2026-04-07
+byline: Meet the GraphQL community worldwide
+featured: true
+---
+
+GraphQL Day ([graphql.org/day](https://graphql.org/day)) is going global in 2026! After a successful debut in Paris, GraphQL Day is going on tour worldwide as part of [FOST (Future of Software Technologies)](https://joinfost.io/) — a federation of conferences bringing together the GraphQL, AsyncAPI, OpenAPI, and JSON Schema communities.
+
+GraphQL Day is the place to meet the GraphQL community: startups, enterprise, open source maintainers, vendors, business leaders, students and more! Expect content for both experts and beginners. FOST is the perfect opportunity to connect with wider ecosystem and stay on top of API technologies.
+
+## 2026 Schedule
+
+For 2026, you can expect GraphQL Days in the cities below: 
+
+- **[Singapore](https://graphql.org/day/2026/singapore/)** - April 14–15
+- **[New York City](https://graphql.org/day/2026/nyc/)** - May 13–14
+- **[Amsterdam](https://graphql.org/day/2026/amsterdam/)** - June 9-10 
+- **[Melbourne](https://graphql.org/day/2026/melbourne/)** - October 28–29
+- **[Paris](https://graphql.org/day/2026/paris/)** - December 1–3
+
+More locations are being investigated. Subscribe to the GraphQL socials ([X](https://x.com/GraphQL), [BlueSky](https://bsky.app/profile/graphql.org), [LinkedIn](https://www.linkedin.com/company/51722505/), [GraphQL Weekly](https://www.graphqlweekly.com/)) to get the latest news! 
+
+## Call for Speakers
+
+We're looking for speakers across all events! Any GraphQL topic is welcome — production war stories, technical deep-dives, workshops, or lightning talks. We especially appreciate talks that speak to the broader FOST audience, including folks from adjacent API communities. 
+
+[Submit your talk →](https://forms.gle/M1kiuvwK2wLJyNzi9)
+
+## Get Your Tickets
+
+Singapore tickets are available now, with tickets for the other cities coming soon. Visit [graphql.org/day](https://graphql.org/day) for all the details and to grab your spot.
+
+See you there!