12 utilities for time, dates, timers and astronomy (sun + moon).
No sign-up. No tracking. No ads.
Calculate exact age or difference between two dates. Years, months, days, weeks, hours, minutes.
Three timers in one. Work sessions, accurate stopwatch, countdown. Notifications for background tabs.
Unix timestamp to human date and back. Live clock, relative time, seconds or milliseconds.
Paste any cron expression and see it in plain English plus the next 5 run times.
Convert times between any zones. Live world clock for your favorite cities.
Count business days between two dates. Skips weekends, with optional public-holiday exclusions.
Date ↔ ordinal day (1-366), ISO 8601 week number, quarter, days remaining in year, year progress %.
Live days / hours / minutes / seconds to any future date. Presets for New Year, Christmas, custom moment.
Convert between ISO 8601, US, EU, RFC 2822, Unix timestamps. Edit any field — all others update live.
Project-deadline math — add/subtract days, weeks, months, years. Business-day mode skips weekends.
Sunrise + sunset + day length + twilight phases for any lat / lng / date. NOAA algorithm.
Current moon phase + illumination + next full / new moon dates. Pick any date.
Exact duration between two dates and times, broken into days/hours/minutes and totals.
A complete time & date toolkit — age + datediff calculator, working-days counter (add days from today or count between dates), day-of-year, ISO week, Unix timestamps, cron explainer, timezone converter, countdown timer, Pomodoro timer, date format converter, plus sunrise / sunset and moon phase for any location.
Two modes: (1) add X working days from any date — get the resulting date; (2) count working days between two dates. Both auto-skip weekends and any public holidays you list.
Use the Day of the Year tool — it shows today's number, the percentage progress through the year, and converts both directions (date → number and number → date). 366 in leap years.
Yes — standard five-field cron (minute / hour / day / month / weekday) plus the Quartz six-field variant (with seconds), special characters L, W, # for weekday-of-month math.
Yes — completely free, no sign-up, no upload. All math runs in your browser.