diff --git a/page/src/components/CalendarGrid/CalendarGrid.js b/page/src/components/CalendarGrid/CalendarGrid.js
index a4b610d0e0..1de5536920 100644
--- a/page/src/components/CalendarGrid/CalendarGrid.js
+++ b/page/src/components/CalendarGrid/CalendarGrid.js
@@ -14,8 +14,8 @@ const CalendarGrid = ({year}) => {
     for (let m = 0; m < 12; m++) {
       let days = [];
       // Iterate days
-      let startDate = new Date(year, m);
-      let endDate = new Date(year, m + 1);
+      let startDate = new Date(Date.UTC(year, m));
+      let endDate = new Date(Date.UTC(year, m + 1));
       for (const dayDate of DayRange(startDate, endDate)) {
         days.push({
           date: dayDate,
diff --git a/page/src/components/CalendarGrid/CalendarGrid.utils.js b/page/src/components/CalendarGrid/CalendarGrid.utils.js
index f0f2b9a098..165831c9c6 100644
--- a/page/src/components/CalendarGrid/CalendarGrid.utils.js
+++ b/page/src/components/CalendarGrid/CalendarGrid.utils.js
@@ -3,7 +3,7 @@ import allEvents from 'misc/all-events.json';
 export const getEventsOnDate = date => {
   let events = [];
   for (const event of allEvents) {
-    if (date >= event.date[0] && date < (event.date[1] ?? event.date[0])) {
+    if (date >= event.date[0] && date <= (event.date[1] ?? event.date[0])) {
       events.push(Object.assign({}, event));
     }
   }
diff --git a/tools/mdParser.js b/tools/mdParser.js
index a1d0de1bd5..92e30b8f9e 100644
--- a/tools/mdParser.js
+++ b/tools/mdParser.js
@@ -10,6 +10,8 @@ const MONTHS_NAMES =
   );
 const MONTHS_SHORTNAMES = MONTHS_NAMES.map((m) => m.slice(0, 3));
 
+const getTimeStamp = (year,month,day) => new Date(Date.UTC(year,month,day,0,0,0)).getTime()
+
 const extractArchiveFiles = (
   markdown //eg: " * [2017](archives/2017.md)"
 ) =>
@@ -89,26 +91,17 @@ const extractEvents = (monthMarkdown, year, month) =>
 const getTimeSpan = (year, month, datespan) => {
   const [startDay, endDay] = datespan.split("-").map((d) => d.trim());
   if (!endDay) {
-    return [new Date(year, month, +startDay, 0, 0, 0).getTime()];
+    return [ getTimeStamp(year,month,+startDay) ]
   }
   if (endDay.includes("/")) {
     //event ends next month "31-02/04"
-    return [
-      new Date(year, month, +startDay, 0, 0, 0).getTime(),
-      new Date(year, month + 1, +endDay.split("/")[0], 0, 0, 0).getTime(),
-    ];
+    return [ getTimeStamp(year,month,+startDay), getTimeStamp(year,month+1,+endDay.split('/')[0])]
   }
   if (+startDay > +endDay) {
     //event ends next month "31-02"
-    return [
-      new Date(year, month, +startDay, 0, 0, 0).getTime(),
-      new Date(year, month + 1, +endDay, 0, 0, 0).getTime(),
-    ];
+    return [ getTimeStamp(year,month,+startDay), getTimeStamp(year,month+1,+endDay)]
   }
-  return [
-    new Date(year, month, +startDay, 0, 0, 0).getTime(),
-    new Date(year, month, +endDay, 0, 0, 0).getTime(),
-  ];
+  return [ getTimeStamp(year,month,+startDay), getTimeStamp(year,month,+endDay,0,0,0)]
 };
 const extractCfp = (shieldCode) => {
   if (!shieldCode.includes("shields.io")) return {};
@@ -127,7 +120,7 @@ const extractCfp = (shieldCode) => {
   const monthStr = untilStr.replaceAll(/[^a-zA-Z]/g, "");
   const month = MONTHS_SHORTNAMES.indexOf(monthStr.slice(0, 3).toLowerCase());
   const day = untilStr.replaceAll(/^\D*(\d{1,2}).*$/g, "$1");
-  const untilDate = new Date(year, month, day, 0, 0, 0).getTime();
+  const untilDate = getTimeStamp(year, month, day)
 
   return {
     link: shieldCode.includes("href=")