Date
Date calculator
Difference between dates
Add/subtract days
Frequently Asked Questions
What date formats are commonly used?
ISO 8601 (YYYY-MM-DD) is the international standard. US uses MM/DD/YYYY, Europe uses DD/MM/YYYY. Always specify format to avoid confusion.
How do I calculate days between dates?
Convert both dates to timestamps, subtract them, and divide by 86400000 (milliseconds in a day). Account for timezone and daylight saving changes.
What is the difference between UTC and local time?
UTC is the universal time standard with no timezone offset. Local time is UTC plus/minus your timezone offset, which may include daylight saving adjustments.