Check DST observance and transition dates for any timezone — spring forward dates decoded. Never miss a global meeting again — free, local, no signup.
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
Count working days between two dates excluding weekends — HR teams prorate leave and payroll accurately. A 20-day leave request spans 28 calendar days — free, no signup, runs locally.
Find the weekday for any Gregorian date — plan anniversaries, verify old records, settle bets. Check what day you were born in seconds — free, no signup, runs locally.
Convert Unix timestamps to human-readable dates and back. Shows UTC, ISO 8601, locale, date, and time formats. Milliseconds, seconds, and ISO 8601 convert both directions with timezone clarity — local math, free, no signup.
See live times across world time zones with DST handling — schedule global meetings right. Know Tokyo time before calling — free, local, no signup.
US: second Sunday March forward, first Sunday November back. EU: last Sundays of March/October. Enter the zone for exact local dates.
Most of Asia, Africa (except parts), Arizona, Hawaii — plus Southern Hemisphere on flipped schedules. The checker names each zone's rule.
Check both zones' transition weeks: a standing meeting shifts for one side only. Reconfirm March and October slots yearly.
No — checks run locally in your browser. Nothing leaves your device.
US: March 8 to November 1. EU: March 29 to October 25. Enter any date and the tool reports whether DST applies and the UTC offset in force.
Meeting Time Planner
Find meeting slots across attendee time zones with working-hours overlap. Schedule standups spanning continents fairly — free, local, no signup.
Leap Year Calculator
Test any year for leap status with the full Gregorian rule — divisible by 4, except centuries unless divisible by 400. Settle the 1900 vs 2000 debate instantly — free, runs locally.
Last updated October 2026