About DateTimeLab — Trusted Date & Time Tools
Free, accurate, and expert-verified date and time calculators for everyone.
Our Mission
DateTimeLab exists to make precise date and time calculations accessible to everyone, everywhere — free of charge, without sign-ups, and without advertisements cluttering the tools. Whether you are calculating the days between two dates, converting timezones for an international meeting, or verifying whether a year is a leap year, every tool on DateTimeLab is built to give you the correct answer instantly.
Every formula is grounded in calendar mathematics and validated against edge cases: leap years, Daylight Saving Time transitions, month-end overflow, and historical calendar reforms. DateTimeLab serves 13 countries with localized timezone defaults, date formats, and real-world holiday examples.
About the Expert
Vipul Jaganiya is a Computer Science graduate specializing in Calendar Mathematics and Timezone Engineering. He designed and built all 12 calculator tools on DateTimeLab, each one rigorously validated for accuracy across leap years, DST transitions, and all Gregorian calendar edge cases. DateTimeLab serves users in 13 countries with localized date formats, timezones, and public holiday data.
How Tools Are Validated
Every DateTimeLab calculator goes through a strict validation process before publication:
- Formula accuracy — verified against ISO 8601 and RFC 5545 standards
- Leap year handling — tested for years 1900, 2000, 2100, and all boundary cases
- DST testing — verified across all 13 country timezones at DST transition boundaries
- Month-end overflow — tested for adding months to dates like January 31
- Cross-timezone validation — results checked against multiple independent time libraries