Date Calculator | vclocks.com

Date Calculator Tools

Timestamp Conversion

Date Addition/Subtraction

Timezone Conversion

Date Difference

Timestamp (milliseconds)

Output Format

Conversion Result

Base Date

Type

Unit

Value

Calculation Result

Source Date & Time

Source Timezone (UTC offset)

Target Timezone (UTC offset)

Timezone Conversion Result

Start Date

End Date

Display Unit

Date Difference Result

Useful Date Calculator Tips

Timestamp Conversion Made Easy

Convert between timestamps (milliseconds since 1970) and human-readable dates. Supports multiple output formats including full date/time, ISO format, date only, and time only for different use cases.

Add or Subtract Time from Any Date

Easily add or subtract days, hours, minutes, seconds, months, or years from any given date and time. Perfect for calculating future deadlines or past events.

Timezone Conversion Across the Globe

Convert dates and times between different timezones (UTC offsets). Supports major global timezones including UTC+8 (China), UTC-5 (US Eastern), UTC+9 (Japan) and more.

Calculate Exact Date Differences

Find the exact difference between two dates in days, hours, minutes, seconds, or a comprehensive breakdown of all units. Great for calculating age, project durations, or event intervals.

Local Storage for Your Last Calculations

Your last input values and calculation settings are stored locally in your browser. When you revisit the Date Calculator page, the system will automatically restore your previous inputs, saving you time on re-entry.