Reminders.

Wino.Core.Domain/Entities/Calendar/Reminder.cs

@@ -10,6 +10,10 @@ public class Reminder
     public Guid Id { get; set; }
     public Guid CalendarItemId { get; set; }
 
-    public DateTimeOffset ReminderTime { get; set; }
+    /// <summary>
+    /// Duration in seconds before the event start time when the reminder should trigger.
+    /// For example, 900 seconds = 15 minutes before event.
+    /// </summary>
+    public long DurationInSeconds { get; set; }
     public CalendarItemReminderType ReminderType { get; set; }
 }