diff --git a/src/events/index.yaml b/src/events/index.yaml
index 1b65cd4..33072ab 100644
--- a/src/events/index.yaml
+++ b/src/events/index.yaml
@@ -333,7 +333,7 @@
   speakers:
     - mykola-siusko
 
-- id: pc24rom
+- id: c24rom
   issue: 23
   type: privacy-corner
   date: "2024-10-04"
@@ -364,7 +364,7 @@
     - pg
     - tree
 
-- id: pc24brn
+- id: c24brn
   issue: 24
   type: privacy-corner
   date: "2024-10-25"
diff --git a/utils/test.js b/utils/test.js
index 1ce5baf..a9e3e27 100644
--- a/utils/test.js
+++ b/utils/test.js
@@ -23,3 +23,38 @@ function checkCollection(name, schema, data) {
 
 // check index
 checkCollection("index", engine.schemas.index, engine.rendered);
+
+// check events
+const eventTypes = {
+  summit: { code: "s" },
+  meetup: { code: "m" },
+  hackathon: { code: "h" },
+  "privacy-corner": { code: "c" },
+};
+const usedIds = [];
+for (const event of engine.rendered.events) {
+  Deno.test(`event: ${event.id}`, () => {
+    // check id duplicates
+    if (usedIds.includes(event.id)) {
+      throw `Duplicate ID: ${event.id}`;
+    }
+    usedIds.push(event.id);
+
+    // check id
+    const codes = Object.keys(eventTypes).map((et) => eventTypes[et].code);
+    const match = event.id.match(
+      new RegExp(`^(${codes.join("|")})(\\d{2})(\\w{2,3})$`),
+    );
+    if (!match) {
+      throw `Bad event id: ${event.id}`;
+    }
+    const [_, type, year, location] = match;
+    if (eventTypes[event.type].code !== type) {
+      throw `ID doesnt reflect event type: id=${event.id} type=${event.type}`;
+    }
+    const eventYear = event.date.match(/^\d{2}(\d{2})/)[1];
+    if (year !== eventYear) {
+      throw `ID doesnt reflect event year: id=${event.id} date=${event.date}`;
+    }
+  });
+}