Added a Workarond for the DST (European Daylight Saving Time (DST))

src/util.ts

@@ -41,4 +41,51 @@ export function getTsNow() {
 }
 
 export function unixToDate( unix_timestamp: number ) { return new Date(unix_timestamp * 1000) }
-export function dateToUnix( date: Date ) { return Math.round( date.getTime()/1000 ) }
+export function dateToUnix( date: Date ) { return Math.round( date.getTime()/1000 ) }
+
+export function formatTimeDiff(dateA: Date, dateB: Date) {
+  // Difference in milliseconds
+  const diffMs = dateB.getTime() - dateA.getTime();
+
+  // Get sign (+ or -)
+  const sign = diffMs < 0 ? "-" : "";
+
+  // Convert to absolute minutes
+  const diffMinutes = Math.floor(Math.abs(diffMs) / 60000);
+
+  // Split into hours and minutes
+  const hours = Math.floor(diffMinutes / 60);
+  const minutes = diffMinutes % 60;
+
+  // Return formatted string
+  return `${sign}${String(hours).padStart(2, "0")}:${String(minutes).padStart(2, "0")}`;
+}
+
+export function subtractHours(date: Date, hours: number) {
+  // Create a new Date so we don't mutate the original
+  return new Date(date.getTime() - hours * 60 * 60 * 1000);
+}
+
+// Helper: get last Sunday of a given month
+function lastSundayOfMonth(year: number, month: number ) {
+  const lastDay = new Date(Date.UTC(year, month + 1, 0)); // last day of month
+  const day = lastDay.getUTCDay(); // 0 = Sunday
+  const diff = day === 0 ? 0 : day; // how far back to go to reach Sunday
+  lastDay.setUTCDate(lastDay.getUTCDate() - diff);
+  return lastDay;
+}
+
+export function isEuropeanDST( date: Date ) {
+  const year = date.getFullYear();
+
+  // DST starts: last Sunday in March, 01:00 UTC
+  const start = lastSundayOfMonth(year, 2); // March (month = 2)
+  start.setUTCHours(1, 0, 0, 0);
+
+  // DST ends: last Sunday in October, 01:00 UTC
+  const end = lastSundayOfMonth(year, 9); // October (month = 9)
+  end.setUTCHours(1, 0, 0, 0);
+
+  // Return true if within DST period
+  return date >= start && date < end;
+}