Date & Time Tools

Timezone converter, date calculator, and ISO 8601 formatter.

Convert Between Timezones
Current Time in Timezone
Date Difference
Add/Subtract Time

Use negative numbers to subtract

Format to ISO 8601
Parse ISO 8601
Examples:

What Are Date and Time Tools?

Date and time tools help developers work with timezone conversions, date arithmetic, and date format standardization. These operations are essential when building applications that serve users across multiple timezones, schedule events, calculate durations, or parse dates from different sources.

How to Use These Tools

  • Timezone Converter: Convert a date and time from one timezone to another. Select the source and target timezones and see the converted result instantly.
  • Date Calculator: Add or subtract days, months, or years from a date, or calculate the difference between two dates.
  • ISO 8601 Formatter: Parse and format dates in the ISO 8601 standard used in APIs and data interchange.

Common Use Cases

  • Meeting Scheduling: Convert meeting times across timezones for distributed teams.
  • API Development: Format dates in ISO 8601 for REST API request and response payloads.
  • Project Planning: Calculate deadlines by adding business days to a start date.
  • Data Processing: Parse and standardize dates from different formats in imported data.
  • Age Calculation: Determine the exact number of days, months, or years between two dates.

Why Use This Tool?

  • Comprehensive date and time conversion utilities in one place.
  • Supports timezone conversions and date calculations.
  • Essential for developers working with international applications.
  • Fast and accurate date/time operations.

Frequently Asked Questions

ISO 8601 is an international standard for representing dates and times in a consistent format: YYYY-MM-DDTHH:mm:ssZ. It eliminates ambiguity between date formats (MM/DD vs DD/MM) and is the recommended format for APIs, databases, and data interchange.

UTC (Coordinated Universal Time) is the primary time standard used worldwide. It is the basis for all civil time — timezones are defined as offsets from UTC (e.g., EST is UTC-5). Storing dates in UTC and converting to local time for display is a best practice in software development.