Time management, global time zones, countdowns, and productivity timers
Track remaining days, hours, minutes, and seconds until any future calendar date, exam, or special event.
Track live local times across major world cities (London, New York, Tokyo, Istanbul) and time differences.
Millisecond-precision online stopwatch with lap recording and keyboard shortcuts.
Set minute and second duration timers for workouts, cooking, or breaks with an audible browser alarm bell.
Track days, hours, and minutes elapsed since a milestone (habit quitting, relationship anniversary, project launch).
Boost productivity with classic 25/5 min Pomodoro intervals, custom session lengths, session counter, and audio chimes.
Calculate optimal sleep and wake times based on natural 90-minute REM sleep cycles.
Track habit streaks with Jerry Seinfeld's 'Don't Break the Chain' method and 66-day milestones.
Find the exact ISO-8601 week number (e.g., 2026-W41), fiscal quarter (Q1–Q4), day of year, and remaining days in the year for any date.
Compare working hours across Istanbul, London, Berlin, New York, San Francisco, and Tokyo to find optimal overlapping meeting slots.
Calculate exact future shift and off-duty days for 12/36, 24/48, 4-on/2-off, and industrial rotating schedules.
Convert days, hours, and minutes into exact milliseconds for JavaScript timers, seconds for Redis TTL, and HTTP Cache-Control max-age headers.