Date, Time & Calendars
Epoch clocks, timezone converters, astronomical moon calculators, and precision interval timers.
Available Tools in this Suite
9 Utilities CatalogedUnix Timestamp & Epoch Converter
Convert Unix epoch timestamps to human-readable UTC/local dates, relative time, and convert dates back to seconds/ms.
ISO 8601 & RFC 3339 Date Formatter
Convert and format timestamps into ISO 8601, RFC 3339, RFC 2822, and standard formats.
Date Difference & Duration Calculator
Calculate exact days, weeks, months, and hours between two calendar dates.
Date Add & Subtract Calculator
Add or subtract days, weeks, months, and years from any baseline date.
World Clock & Timezone Converter
Convert times across major global financial hubs and international timezones simultaneously.
Business Days & Working Hours Calculator
Calculate working days, weekends, and standard 8-hour billable work hours between dates.
Days Countdown Timer to Target Date
Track real-time days, hours, minutes, and seconds remaining until any holiday, deadline, or event.
Day of the Week & Leap Year Checker
Find the exact day of the week for any historical or future date and check leap years.
Age Calculator in Years, Months & Days
Calculate exact age in years, months, and days, plus countdown to next birthday.
Date, Time & Calendars Architecture & Specifications
Local runtime benchmarks and security parameters for all Date, Time & Calendars utilities.
Real-World Workflows & Applications
Common technical problems solved with zero server dependencies.
Server Log & Event Correlation
Convert Unix epoch timestamps from cloud server logs (AWS, Cloudflare, Docker) into human-readable local time.
Global Team Meeting Coordination
Calculate simultaneous business hours across London, New York, Tokyo, and Berlin without timezone conversion errors.
Project Milestone Scheduling
Compute net working business days between contract start and completion dates excluding weekends and public holidays.
Standardized Date & Time Formats
Standard specifications and quick-lookup reference table.
| Standard | Format Example | Description | Application |
|---|---|---|---|
| ISO 8601 | 2026-10-14T21:45:00Z | Universal UTC timestamp with Z indicator | REST APIs, JSON payloads, MongoDB |
| Unix Epoch (Sec) | 1791995100 | Seconds elapsed since 1970-01-01 | Database timestamps, JWT expiry (exp) |
| Unix Epoch (Ms) | 1791995100000 | Milliseconds elapsed since 1970-01-01 | JavaScript Date.now(), browser performance |
| RFC 2822 | Wed, 14 Oct 2026 21:45:00 GMT | Email and HTTP header date format | HTTP Last-Modified, SMTP headers |
| SQL Date | 2026-10-14 | Standard relational date column | PostgreSQL, MySQL, SQLite date fields |