utcOffset()

.utcOffset(): number

.utcOffset(offset: number): FduInstance

import { fdu } from "@pyyupsk/fdu";

const date = fdu("2025-10-05T12:00:00Z");
const offset = date.utcOffset();

console.log(offset); // Your local timezone offset in minutes
// Examples:
// 0 for UTC
// 480 for UTC+8 (8 hours ahead)
// -300 for UTC-5 (5 hours behind)

const date = fdu("2025-10-05T12:00:00Z");

// Convert to UTC+8 (480 minutes)
const utcPlus8 = date.utcOffset(480);

// Convert to UTC-5 (-300 minutes)
const utcMinus5 = date.utcOffset(-300);

const utcDate = fdu("2025-10-05T12:00:00Z");
const currentOffset = utcDate.utcOffset();

// Convert to different timezones
const tokyo = utcDate.utcOffset(currentOffset + 540); // UTC+9
const newYork = utcDate.utcOffset(currentOffset - 300); // UTC-5
const london = utcDate.utcOffset(currentOffset + 0); // UTC+0
const sydney = utcDate.utcOffset(currentOffset + 600); // UTC+10

console.log("Tokyo:", tokyo.format("YYYY-MM-DD HH:mm"));
console.log("New York:", newYork.format("YYYY-MM-DD HH:mm"));
console.log("London:", london.format("YYYY-MM-DD HH:mm"));
console.log("Sydney:", sydney.format("YYYY-MM-DD HH:mm"));

const date = fdu("2025-10-05T12:00:00Z");
const currentOffset = date.utcOffset();

const result = date
  .utcOffset(currentOffset + 480) // Convert to UTC+8
  .add(1, "day") // Add 1 day
  .format("YYYY-MM-DD HH:mm");

const original = fdu("2025-10-05T12:00:00Z");
const currentOffset = original.utcOffset();
const modified = original.utcOffset(currentOffset + 480);

console.log(original.utcOffset()); // Original offset (unchanged)
console.log(modified.utcOffset()); // Original offset + 480

const meetingTime = fdu("2025-10-05T14:00:00Z");
const baseOffset = meetingTime.utcOffset();

const timezones = {
  "Los Angeles": baseOffset - 480,
  "New York": baseOffset - 300,
  London: baseOffset + 0,
  Tokyo: baseOffset + 540,
};

Object.entries(timezones).forEach(([city, offset]) => {
  const localTime = meetingTime.utcOffset(offset);
  console.log(`${city}: ${localTime.format("YYYY-MM-DD HH:mm")}`);
});

// Server expects UTC-5 (EST)
const localDate = fdu();
const currentOffset = localDate.utcOffset();
const estDate = localDate.utcOffset(currentOffset - 300);

await api.scheduleEvent({
  datetime: estDate.toISOString(),
  timezone: "America/New_York",
});

const date1 = fdu("2025-10-05T12:00:00Z");
const date2 = fdu("2025-10-05T12:00:00Z");

const offset1 = date1.utcOffset();
const offset2 = date2.utcOffset();

const offsetDiff = offset2 - offset1;
console.log(`Offset difference: ${offsetDiff} minutes`);