diff --git a/app/.env.development b/app/.env.development
index 42a6ada..614b9f6 100644
--- a/app/.env.development
+++ b/app/.env.development
@@ -4,3 +4,4 @@ POSTGRES_HOST=0.0.0.0
 POSTGRES_PORT=5432
 POSTGRES_DB=postgres
 DATABASE_URL=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}
+CRON_SECRET=secret
\ No newline at end of file
diff --git a/app/src/lib/db/schema.ts b/app/src/lib/db/schema.ts
index 3824ccb..2de5871 100644
--- a/app/src/lib/db/schema.ts
+++ b/app/src/lib/db/schema.ts
@@ -32,6 +32,7 @@ export const cuatrimestre = pgTable(
       using: sql`true`,
     }),
     check("cuatrimestre_numero_check", sql`numero = ANY (ARRAY[1, 2])`),
+    unique("cuatrimestre_natural_key").on(table.anio, table.numero),
   ],
 );
 
diff --git a/app/src/routes/api/cronjobs/generarcuatrimestre/+server.ts b/app/src/routes/api/cronjobs/generarcuatrimestre/+server.ts
new file mode 100644
index 0000000..8a84990
--- /dev/null
+++ b/app/src/routes/api/cronjobs/generarcuatrimestre/+server.ts
@@ -0,0 +1,54 @@
+import { CRON_SECRET } from "$env/static/private";
+import db from "$lib/db";
+import { cuatrimestre } from "$lib/db/schema";
+import type { RequestHandler } from "@sveltejs/kit";
+
+interface Cuatrimestre {
+  anio: number;
+  numero: number;
+}
+
+function calcularCuatrimestreAnterior(fechaActual: Date): Cuatrimestre {
+  const mesActual = fechaActual.getUTCMonth() + 1;
+  // 1er Cuatri Diciembre-Junio, 2do Cuatri Julio-Noviembre.
+  const cuatrimestreActual = mesActual <= 6 || mesActual == 12 ? 1 : 2;
+  const cuatrimestrePasado = {
+    anio: fechaActual.getUTCFullYear(),
+    numero: cuatrimestreActual - 1,
+  };
+
+  if (cuatrimestrePasado.numero === 0) {
+    cuatrimestrePasado.anio--;
+    cuatrimestrePasado.numero = 2;
+  }
+
+  return cuatrimestrePasado;
+}
+
+export const GET: RequestHandler = async ({ request }) => {
+  const authHeader = request.headers.get("Authorization");
+  if (authHeader !== `Bearer ${CRON_SECRET}`) {
+    return new Response("Unauthorized", {
+      status: 401,
+    });
+  }
+
+  const fechaActual = new Date();
+  const cuatrimestreAnterior = calcularCuatrimestreAnterior(fechaActual);
+  let registro;
+  try {
+    registro = await db
+      .insert(cuatrimestre)
+      .values(cuatrimestreAnterior)
+      .returning();
+  } catch (err: any) {
+    const UNIQUE_VIOLATION = "23505";
+    if (err?.code == UNIQUE_VIOLATION)
+      return new Response("Cuatrimestre duplicado", { status: 400 });
+    else throw err;
+  }
+
+  return new Response(JSON.stringify(registro), {
+    status: 201,
+  });
+};
diff --git a/app/vercel.json b/app/vercel.json
index c8833c8..216d967 100644
--- a/app/vercel.json
+++ b/app/vercel.json
@@ -1,4 +1,14 @@
 {
   "framework": "sveltekit-1",
-  "regions": ["gru1"]
+  "regions": ["gru1"],
+  "crons": [
+    {
+      "path": "/api/cronjobs/generarcuatrimestre",
+      "schedule": "0 0 1 7 *"
+    },
+    {
+      "path": "/api/cronjobs/generarcuatrimestre",
+      "schedule": "0 0 1 12 *"
+    }
+  ]
 }