How do I use the Time & Date Master?

Enter the required values and the Time & Date Master will instantly calculate and display the result. No registration required.

Is the Time & Date Master free?

Yes, all tools on CalcBOX are completely free with no registration required.

All calculations are performed in your browser. No data is sent to any server.

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Time & Date Master

Day count, time calculator, and Unix timestamp converter in one. Business days & timezone support.

Start Date

2026/4/4 (Sat)

End Date

Show business days

About Time Master

Days Calculator: Calculate days, weeks, months, and years between two dates. Includes business days counting (excludes weekends and Japanese holidays).

Time Calculator: Add or subtract HH:MM:SS time durations. Convert between hours, minutes, and seconds.

Timestamp: Convert Unix timestamps to dates and vice versa. Live-updating current time display with timezone selection.

📖How to Use

1Select a mode: date difference, time calculation, or timestamp conversion
2Enter start/end dates or a Unix timestamp
3See the difference or converted result

💡Tips & Knowledge

•Unix timestamps count seconds since January 1, 1970, 00:00:00 UTC
•"X days from now" or "X weeks ago" is handy for deadline tracking
•Supports timezone conversion for scheduling global meetings

🔗 Related Tools

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All calculations run in your browser. No data is sent to any server.