From 9b1ef646187838964e5d9e5f3c00f9288d0e049e Mon Sep 17 00:00:00 2001
From: Levente Orban <leventeorb@gmail.com>
Date: Mon, 20 Oct 2025 11:25:35 +0200
Subject: [PATCH] fix: creating an event and showing the wrong date

---
 src/lib/calendarHelpers.ts                 |  5 ++++-
 src/lib/dateHelpers.ts                     | 18 ++++++++++++------
 src/routes/create/+page.server.ts          | 10 ++++++++--
 src/routes/discover/+page.svelte           | 14 ++++++++++----
 src/routes/event/[id]/edit/+page.server.ts |  5 +++--
 5 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/src/lib/calendarHelpers.ts b/src/lib/calendarHelpers.ts
index efb38e7..925b880 100644
--- a/src/lib/calendarHelpers.ts
+++ b/src/lib/calendarHelpers.ts
@@ -15,7 +15,10 @@ export interface CalendarEvent {
  * Formats a date and time string for iCal format (UTC)
  */
 export const formatDateForICal = (date: string, time: string): string => {
-	const eventDate = new Date(`${date}T${time}`);
+	// Parse date and time as local timezone to avoid timezone issues
+	const [year, month, day] = date.split('-').map(Number);
+	const [hours, minutes, seconds] = time.split(':').map(Number);
+	const eventDate = new Date(year, month - 1, day, hours, minutes, seconds || 0);
 	return eventDate.toISOString().replace(/[-:]/g, '').split('.')[0] + 'Z';
 };
 
diff --git a/src/lib/dateHelpers.ts b/src/lib/dateHelpers.ts
index d9536c5..6abb16c 100644
--- a/src/lib/dateHelpers.ts
+++ b/src/lib/dateHelpers.ts
@@ -1,11 +1,14 @@
 import type { Event } from './types';
 
 export const formatDate = (dateString: string): string => {
-	const date = new Date(dateString);
-	const year = date.getFullYear();
-	const month = String(date.getMonth() + 1).padStart(2, '0');
-	const day = String(date.getDate()).padStart(2, '0');
-	return `${year}/${month}/${day}`;
+	// Parse the date string as local date to avoid timezone issues
+	// Split the date string and create a Date object in local timezone
+	const [year, month, day] = dateString.split('-').map(Number);
+	const date = new Date(year, month - 1, day); // month is 0-indexed in Date constructor
+	const formattedYear = date.getFullYear();
+	const formattedMonth = String(date.getMonth() + 1).padStart(2, '0');
+	const formattedDay = String(date.getDate()).padStart(2, '0');
+	return `${formattedYear}/${formattedMonth}/${formattedDay}`;
 };
 
 export const formatTime = (timeString: string): string => {
@@ -17,7 +20,10 @@ export const formatTime = (timeString: string): string => {
 export const isEventInTimeRange = (event: Event, timeFilter: string): boolean => {
 	if (timeFilter === 'any') return true;
 
-	const eventDate = new Date(`${event.date}T${event.time}`);
+	// Parse date and time as local timezone to avoid timezone issues
+	const [year, month, day] = event.date.split('-').map(Number);
+	const [hours, minutes, seconds] = event.time.split(':').map(Number);
+	const eventDate = new Date(year, month - 1, day, hours, minutes, seconds || 0);
 	const now = new Date();
 
 	// Handle temporal status filters
diff --git a/src/routes/create/+page.server.ts b/src/routes/create/+page.server.ts
index d8d0d56..f34b14f 100644
--- a/src/routes/create/+page.server.ts
+++ b/src/routes/create/+page.server.ts
@@ -56,7 +56,13 @@ export const actions: Actions = {
 			});
 		}
 
-		if (new Date(date) < new Date()) {
+		// Check if date is in the past using local timezone
+		const [year, month, day] = date.split('-').map(Number);
+		const eventDate = new Date(year, month - 1, day);
+		const today = new Date();
+		today.setHours(0, 0, 0, 0);
+
+		if (eventDate < today) {
 			return fail(400, {
 				error: 'Date cannot be in the past.',
 				values: {
@@ -105,7 +111,7 @@ export const actions: Actions = {
 				type: type,
 				attendeeLimit: type === 'limited' ? parseInt(attendeeLimit) : null,
 				visibility: visibility,
-				userId: userId
+				userId: userId!
 			})
 			.catch((error) => {
 				console.error('Unexpected error', error);
diff --git a/src/routes/discover/+page.svelte b/src/routes/discover/+page.svelte
index 1381fb0..9c7c13b 100644
--- a/src/routes/discover/+page.svelte
+++ b/src/routes/discover/+page.svelte
@@ -1,7 +1,6 @@
 <script lang="ts">
 	import type { Event, EventType } from '$lib/types';
 	import { goto } from '$app/navigation';
-	import type { PageData } from '../$types';
 	import { formatTime, formatDate, isEventInTimeRange } from '$lib/dateHelpers';
 	import { t } from '$lib/i18n/i18n.js';
 	import Fuse from 'fuse.js';
@@ -16,7 +15,7 @@
 	let showFilters = false;
 	let fuse: Fuse<Event>;
 
-	export let data: PageData;
+	export let data: any;
 	// Use the server-side data
 	$: publicEvents = data?.events || [];
 
@@ -67,8 +66,15 @@
 
 		// Sort events by date and time
 		events = events.sort((a, b) => {
-			const dateA = new Date(`${a.date}T${a.time}`);
-			const dateB = new Date(`${b.date}T${b.time}`);
+			// Parse dates as local timezone to avoid timezone issues
+			const parseEventDateTime = (event: Event) => {
+				const [year, month, day] = event.date.split('-').map(Number);
+				const [hours, minutes, seconds] = event.time.split(':').map(Number);
+				return new Date(year, month - 1, day, hours, minutes, seconds || 0);
+			};
+
+			const dateA = parseEventDateTime(a);
+			const dateB = parseEventDateTime(b);
 
 			if (selectedSortOrder === 'asc') {
 				return dateA.getTime() - dateB.getTime();
diff --git a/src/routes/event/[id]/edit/+page.server.ts b/src/routes/event/[id]/edit/+page.server.ts
index 39febb4..69b2d81 100644
--- a/src/routes/event/[id]/edit/+page.server.ts
+++ b/src/routes/event/[id]/edit/+page.server.ts
@@ -86,8 +86,9 @@ export const actions: Actions = {
 			});
 		}
 
-		// Check if date is in the past (but allow editing past events for corrections)
-		const eventDate = new Date(date);
+		// Check if date is in the past using local timezone (but allow editing past events for corrections)
+		const [year, month, day] = date.split('-').map(Number);
+		const eventDate = new Date(year, month - 1, day);
 		const today = new Date();
 		today.setHours(0, 0, 0, 0);