Date & Time Tools
Comprehensive date and time calculation tools. Convert between time zones for global coordination, create countdowns to important events, calculate exact age and date differences, track business days, view lunar and traditional calendars, schedule across time zones, and handle all time-related calculations with precision.
See tonight's moon phase, illumination, and moonrise/moonset times for your location, plus a monthly grid and upcoming New and Full Moons.
Run multiple countdown timers simultaneously. Create, name, and color-code timers for cooking, workouts, studying, or any timed activities.
Online stopwatch and countdown timer with centisecond precision, unlimited lap recording, browser notifications, fullscreen mode, and keyboard shortcuts. Works offline and saves your settings.
Browse a complete list of world time zones with abbreviations, UTC offsets, IANA identifiers, DST status, and live local time. Filter by country, region, or offset and export.
Browse public holidays for 199 countries. Filter by holiday type, navigate years from 2024 to 2030, and see the next upcoming holiday at a glance.
Find sunrise, sunset, day length, golden hour, blue hour, and twilight times for any location worldwide, with a 7-day forecast and annual daylight chart.
Calculate your pregnancy due date from your last period, conception date, or known due date, and track your progress and milestones week by week.
See solar and lunar dates side by side with traditional almanac detail: Can Chi, zodiac, solar terms, auspicious hours, and day quality.
Convert dates between solar (Gregorian) and lunar calendars with Can Chi, zodiac, solar terms, and holiday details.
Add or subtract years, months, weeks, and days from any date to find the resulting date instantly.
Find the week number for any date, or look up the date range for a week. Supports ISO 8601 and US week numbering standards.
Find which day of the week any date falls on. Instantly see the weekday name, ISO day number, week number, and a visual month calendar.