diff --git a/server/apiCalls/timeTable/utils/__tests__/createPlannedModularString.test.js b/server/apiCalls/timeTable/utils/__tests__/createPlannedModularString.test.js
index 7a55e2d8..4d7fe2c8 100644
--- a/server/apiCalls/timeTable/utils/__tests__/createPlannedModularString.test.js
+++ b/server/apiCalls/timeTable/utils/__tests__/createPlannedModularString.test.js
@@ -1,5 +1,16 @@
 const { createPlannedModularString } = require('../createPlannedModularString')
 
+const alphabeticallySortedModules = [
+  'module_p1_G2',
+  'module_p1_B2',
+  'module_p1_J2',
+  'module_p1_B1',
+  'module_p1_D1',
+  'module_p1_E2',
+  'module_p1_G1',
+  'module_p1_I1',
+]
+
 describe('createPlannedModularString', () => {
   test('returns empty string if empty modules', () => {
     expect(createPlannedModularString([])).toStrictEqual('')
@@ -31,4 +42,8 @@ describe('createPlannedModularString', () => {
   ])('combines several schemas for different periods', (expected, modules) => {
     expect(createPlannedModularString(modules)).toStrictEqual(expected)
   })
+
+  test('sorts modules first by digit, then letter', () => {
+    expect(createPlannedModularString(alphabeticallySortedModules)).toStrictEqual('P1: B1, D1, G1, I1, B2, E2, G2, J2.')
+  })
 })
diff --git a/server/apiCalls/timeTable/utils/createPlannedModularString.js b/server/apiCalls/timeTable/utils/createPlannedModularString.js
index 60dddd64..715f8284 100644
--- a/server/apiCalls/timeTable/utils/createPlannedModularString.js
+++ b/server/apiCalls/timeTable/utils/createPlannedModularString.js
@@ -20,6 +20,13 @@ const addKeyIfNonexistent = (obj, key) => {
   }
 }
 
+const sortModulesByDigitAndLetter = (a, b) => {
+  const [letterA, digitA] = a
+  const [letterB, digitB] = b
+
+  return Number(digitA) - Number(digitB) || letterA.localeCompare(letterB)
+}
+
 const createPeriodSchemaMapping = modules => {
   const mapping = {}
   modules.forEach(moduleString => {
@@ -36,7 +43,9 @@ const createPeriodSchemaStrings = modules => {
   const mapping = createPeriodSchemaMapping(modules)
 
   return Object.keys(mapping).map(period => {
-    const schemaString = mapping[period].join(', ')
+    const sortedModules = mapping[period].sort(sortModulesByDigitAndLetter)
+
+    const schemaString = sortedModules.join(', ')
 
     return `${period}: ${schemaString}.`
   })