Date & Time
Age, date difference, timezone, timestamps, countdowns, and timers.
8 tools
Age Calculator
Exact age in years/months/days
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Date Difference Calculator
Days/weeks/months between dates
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Timezone Converter
Convert time across timezones
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Unix Timestamp Converter
Epoch ↔ human date
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Countdown Timer
Countdown to any date
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Pomodoro Timer
25/5 focus timer
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Business Days Calculator
Working days between dates
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Week Number Calculator
ISO week of any date
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About Date & Time
Age, date differences, timezones, timestamps, countdowns, and timers — collected in one place so you stop searching for a different calendar website every time.
Who it's for: Project managers, remote-first teams, travellers, students, and anyone whose schedule crosses timezones or counts business days.
What you can do here
- Exact age calculator down to hours and minutes
- Date difference and business-days calculators
- Timezone converter that handles DST automatically
- Unix timestamp ↔ human date with seconds/milliseconds toggle
- Countdown timer and ISO week-number lookup
Common use cases
- Picking a meeting time that works across SF, London, and Singapore
- Counting working days for project deadlines or invoicing
- Building a countdown to a launch, wedding, or trip
- Decoding epoch timestamps in API logs
Frequently asked questions
Do these tools use my system timezone?
Yes — date math defaults to your browser's locale. The timezone converter lets you override both source and target timezones explicitly.
Are leap years and DST handled?
Yes — the underlying date logic uses native JavaScript Date and IANA timezone data your browser ships with.