fix: use Ecuador timezone (GMT-5) for all dates

src/lib/date.ts

@@ -0,0 +1,125 @@
+// Date utilities for La Huasca - Ecuador is GMT-5 (no DST)
+
+/**
+ * Get current date/time in Ecuador timezone (GMT-5)
+ */
+export function getEcuadorDate(): Date {
+  const now = new Date();
+  // Ecuador is UTC-5, so subtract 5 hours from UTC
+  const ecuadorOffset = -5 * 60; // minutes
+  const utcOffset = now.getTimezoneOffset(); // local offset from UTC
+  const ecuadorTime = new Date(now.getTime() + (utcOffset + ecuadorOffset) * 60000);
+  return ecuadorTime;
+}
+
+/**
+ * Get today's date in Ecuador (YYYY-MM-DD format)
+ */
+export function getEcuadorToday(): string {
+  return formatDateEcuador(getEcuadorDate());
+}
+
+/**
+ * Format a date as YYYY-MM-DD in Ecuador timezone
+ */
+export function formatDateEcuador(date: Date): string {
+  const ecuadorOffset = -5 * 60; // minutes
+  const utc = date.getTime() + date.getTimezoneOffset() * 60000;
+  const ecuadorTime = new Date(utc + ecuadorOffset * 60000);
+  
+  const year = ecuadorTime.getFullYear();
+  const month = String(ecuadorTime.getMonth() + 1).padStart(2, '0');
+  const day = String(ecuadorTime.getDate()).padStart(2, '0');
+  
+  return `${year}-${month}-${day}`;
+}
+
+/**
+ * Get a date N days from today in Ecuador timezone
+ */
+export function getEcuadorDateFromToday(days: number): string {
+  const today = getEcuadorDate();
+  today.setDate(today.getDate() + days);
+  return formatDateEcuador(today);
+}
+
+/**
+ * Format a date string (YYYY-MM-DD or ISO) for display in Ecuador timezone
+ */
+export function formatDisplayDate(dateStr: string, options?: Intl.DateTimeFormatOptions): string {
+  const date = parseDateAsEcuador(dateStr);
+  const defaultOptions: Intl.DateTimeFormatOptions = {
+    weekday: 'short',
+    month: 'short',
+    day: 'numeric',
+    timeZone: 'America/Guayaquil',
+  };
+  return date.toLocaleDateString('en-US', options || defaultOptions);
+}
+
+/**
+ * Format a date with full weekday name
+ */
+export function formatDisplayDateFull(dateStr: string): string {
+  return formatDisplayDate(dateStr, {
+    weekday: 'long',
+    year: 'numeric',
+    month: 'long',
+    day: 'numeric',
+    timeZone: 'America/Guayaquil',
+  });
+}
+
+/**
+ * Format a datetime string for display
+ */
+export function formatDisplayDateTime(dateStr: string): string {
+  const date = new Date(dateStr);
+  return date.toLocaleString('en-US', {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+    timeZone: 'America/Guayaquil',
+  });
+}
+
+/**
+ * Parse a date string (YYYY-MM-DD) as Ecuador date, avoiding timezone shifts
+ */
+export function parseDateAsEcuador(dateStr: string): Date {
+  // Parse as local components to avoid timezone shifts
+  const parts = dateStr.split('T')[0].split('-');
+  const year = parseInt(parts[0], 10);
+  const month = parseInt(parts[1], 10) - 1; // JS months are 0-indexed
+  const day = parseInt(parts[2], 10);
+  return new Date(year, month, day);
+}
+
+/**
+ * Calculate days until a date (in Ecuador timezone)
+ */
+export function daysUntilEcuador(dateStr: string): string {
+  const today = getEcuadorDate();
+  today.setHours(0, 0, 0, 0);
+  const target = parseDateAsEcuador(dateStr);
+  target.setHours(0, 0, 0, 0);
+  const diff = Math.ceil((target.getTime() - today.getTime()) / (1000 * 60 * 60 * 24));
+  
+  if (isNaN(diff)) return 'Unknown';
+  if (diff === 0) return 'Today';
+  if (diff === 1) return 'Tomorrow';
+  if (diff < 0) return 'Past';
+  return `in ${diff} days`;
+}
+
+/**
+ * Get month and day for display (e.g., "Jun 29")
+ */
+export function getMonthDayEcuador(dateStr: string): { month: string; day: number } {
+  const date = parseDateAsEcuador(dateStr);
+  return {
+    month: date.toLocaleString('en-US', { month: 'short' }),
+    day: date.getDate(),
+  };
+}