diff --git a/scrape/parse/v1_v2.js b/scrape/parse/v1_v2.js
index 1cd2dd0..d109b26 100644
--- a/scrape/parse/v1_v2.js
+++ b/scrape/parse/v1_v2.js
@@ -35,7 +35,7 @@ export default async function parseV1V2(downloadedFilePath) {
   const datedSheets = [];
 
   for (const sheet of workbook.worksheets) {
-    const match = sheet.name.match(dateRegex);
+    const match = sheet.name.toLowerCase().match(dateRegex);
     if (!match) continue;
 
     const day = parseInt(match[2], 10);
@@ -60,8 +60,8 @@ export default async function parseV1V2(downloadedFilePath) {
   }
 
   const upcomingSheets = Object.values(sheetsByDate).map((sheets) => {
-    if (sheets.length === 1) return sheets[0].name;
-    return (sheets.find((s) => s.state !== "hidden") ?? sheets[0]).name;
+    if (sheets.length === 1) return sheets[0].name.toLowerCase();
+    return (sheets.find((s) => s.state !== "hidden") ?? sheets[0]).name.toLowerCase();
   });
 
   const final = [];
diff --git a/scrape/parse/v3.js b/scrape/parse/v3.js
index 3a6fab9..7a7792a 100644
--- a/scrape/parse/v3.js
+++ b/scrape/parse/v3.js
@@ -63,7 +63,7 @@ function getUpcomingSheets(workbook) {
   const result = [];
 
   for (const sheet of workbook.worksheets) {
-    const match = sheet.name.match(dateRegex);
+    const match = sheet.name.toLowerCase().match(dateRegex);
     if (!match) continue;
 
     const day = Number(match[2]);
@@ -108,7 +108,7 @@ function extractDaySchedule(sheet, teacherMap) {
   return {
     changes: extractClassChanges(sheet),
     absence: extractAbsence(sheet, teacherMap),
-    inWork: isPripravaSheet(sheet.name),
+    inWork: isPripravaSheet(sheet.name.toLowerCase()),
     takesPlace: extractTakesPlace(sheet),
     reservedRooms: extractReservedRooms(sheet)
   };