Time Dashboard

Your current clock, calendar position, time progress and upcoming temporal boundaries.

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Time Progress

How far you currently are through common calendar periods.

Day

ISO Week

Month

Year

Right Now

Calendar facts calculated from your current local date.

Time Until

Live countdowns to the next major calendar boundaries.

World Time

Live IANA time zones, UTC offsets, DST inspection and wall-clock conversion between zones.

World Clock Board

Add time zone

Time Zone Converter

Interpret a wall-clock date/time in one zone and convert it into another.

Date and time

From

Zone Inspector

Current offset, abbreviation and approximate next offset change.

Time zone

Meeting Time Comparator

Enter one moment and see it simultaneously in several zones.

Moment

Interpret in

Stopwatch

High-resolution browser stopwatch with laps and lap deltas.

00:00:00.000

Laps

Timers & Alarms

Countdown timer, simultaneous named timers, alarms and interval/Pomodoro timing.

Countdown Timer

Hours

Minutes

Seconds

00:05:00

Multiple Timers

Name

Duration

Alarm Clock

Alarm time

Label

Browser alarms are reliable while this page remains open. Notifications depend on browser permission and operating-system behavior.

Pomodoro / Interval Timer

Work min

Rest min

Rounds

Ready

25:00

Event Countdown

Count down to a deadline or event and optionally measure progress from a start date.

Event name

Target date/time

Optional start date/time

My Event

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Metronome & Special Clocks

Musical tempo, presentation timing and a two-player chess clock.

Metronome

BPM

Beats / bar

1 / 4

Chess Clock

Initial minutes

Increment seconds

Player A

05:00

Player B

05:00

BPM / Beat Duration

BPM

Frequency ↔ Period

Frequency in Hz

Calendar Lab

ISO week, day-of-year, quarter, leap years, centuries, calendar views and detailed date facts.

Inspect date

Nth Weekday of Month

Year

Month

Occurrence

Weekday

Leap Year

Year

Date Math

Differences, age, calendar arithmetic, business days, relative descriptions and recurring dates.

Difference Between Two Moments

Start

End

Age / Exact Elapsed Time

Birth/start date

Calculate at

Add / Subtract Time

Starting date/time

Years

Months

Days

Hours

Minutes

Seconds

Business Days

Start

End

Relative Time

Date/time

Recurring Dates

First occurrence

Every

Unit

Epochs & Timestamps

Unix time plus many commonly encountered date/time representations used by operating systems, browsers, spreadsheets and scientific software.

Current Epoch Values

Unix Timestamp → Date

Unix timestamp

Unit

Date → Epochs

Date/time

Date String Parser

Date/time string

Epoch Reference

System	Epoch / representation	Notes
Unix	1970-01-01 UTC	Seconds or milliseconds are common.
GPS	1980-01-06 UTC	GPS time does not insert UTC leap seconds.
NTP	1900-01-01 UTC	Traditional NTP timestamp uses seconds + fractional seconds.
Windows FILETIME	1601-01-01 UTC	100 ns intervals.
WebKit / Chrome	1601-01-01 UTC	Microseconds since 1601.
.NET DateTime	0001-01-01	100 ns ticks.
Excel 1900	Serial day number	Contains the historical 1900 leap-year compatibility quirk.
Julian Date	Continuous astronomical day count	Day boundaries occur at noon UTC.

Duration Converter

Convert a quantity into common sub-second and calendar-like time units.

Value

Unit

Duration Breakdown

Convert a raw second count into weeks, days, hours, minutes, seconds and milliseconds.

Seconds

Clock Math

12/24-hour time, military time, decimal time, Swatch Internet Time and clock-hand geometry.

12-hour ↔ 24-hour

Time

Decimal Time

HH:MM:SS

Swatch Internet Time

1000 .beats per mean solar day, based on UTC+1 with no time zones.

@000.00

Clock Hand Angles

Time

Timecode & Frames

Convert video timecode to frames and back at common frame rates, including SMPTE drop-frame numbering for 29.97 and 59.94 fps.

Timecode → Frames

Timecode

Frame rate

Drop-frame numbering

Frames → Timecode

Total frames

Frame rate

Drop-frame numbering

Interpret Footage at Another Frame Rate

Original duration seconds

Recorded FPS

Interpret as FPS

Work & Schedules

Shift durations, breaks, decimal billable hours, overtime and sleep-cycle time arithmetic.

Shift Calculator

Start

End

Unpaid break minutes

Overtime

Hours worked

Regular threshold

HH:MM ↔ Decimal Hours

Time / decimal

Sleep Cycle Arithmetic

Pure time arithmetic using 90-minute cycles. This is not medical sleep advice.

Desired wake time

Fall-asleep allowance minutes

Time Reference

Common time units, constants and relationships.

Unit / concept	Value	Notes
Nanosecond	10⁻⁹ second	1 billion ns = 1 second.
Microsecond	10⁻⁶ second	1 million μs = 1 second.
Millisecond	10⁻³ second	JavaScript Date timestamps use milliseconds.
Second	SI base time unit	Defined via the cesium-133 transition frequency.
Minute	60 seconds
Hour	3,600 seconds
Day	86,400 seconds	Civil days can differ in UTC offset across DST transitions.
Week	7 days	604,800 nominal seconds.
Fortnight	14 days
Common year	365 days	31,536,000 seconds.
Leap year	366 days	Gregorian rule.
Gregorian mean year	365.2425 days	Average over the 400-year Gregorian cycle.
Decade	10 years
Century	100 years	21st century = 2001–2100.
Millennium	1,000 years	3rd millennium = 2001–3000.
Julian year	365.25 days	Exactly 31,557,600 seconds by convention.
Frame at 24 fps	41.6667 ms
Frame at 30 fps	33.3333 ms
120 BPM beat	500 ms	Quarter-note beat.
1 Hz period	1 second	Period = 1 / frequency.