feat: GraphQL Date scalar

server/schemas/scalar-date.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const gql = require('graphql')
+
+module.exports = {
+  Date: new gql.GraphQLScalarType({
+    name: 'Date',
+    description: 'ISO date-time string at UTC',
+    parseValue(value) {
+      return new Date(value)
+    },
+    serialize(value) {
+      return value.toISOString()
+    },
+    parseLiteral(ast) {
+      if (ast.kind !== gql.Kind.STRING) {
+        throw new TypeError('Date value must be an string!')
+      }
+      return new Date(ast.value)
+    }
+  })
+}