Date & Time Tools

Date calculations, timezone conversions, and time utilities.

4 tools

All Date & Time Tools

Calculate exact age in years, months, and days from any birth date.

Calculate the exact difference between two dates in days, weeks, months, and years.

Convert dates to and from ISO 8601 format instantly.

Convert times between different timezones around the world.

Learn what Unix timestamps are, how they work, and how to convert between timestamps and human-readable dates.

Learn cron expression syntax for scheduling tasks. Understand fields, special characters, and common patterns with examples.

Quick reference for percentages, ratios, averages, and common math formulas developers encounter daily.

What are date & time tools?

Date calculations, timezone conversions, and time utilities.

How many date & time tools do you have?

We've got 4 free date & time tools including Age Calculator, Date Difference Calculator, ISO Date Converter, and more. All free to use!

Do I need to make an account?

Nope! Everything on BuildUtilities is free and works without signing up.